Zone 136, Master Map Normal View h c
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Zone 136, Master Map Normal View Zone Master, Normal View, 10 deg FOV Mebsuta ω +24°00' ε M35 Taurus c f µ η +22°00' h Propus Gemini Mekbuda d χ1 χ2 +18°00' ν +20°00' Orion ζ e i γ +16°00' g Alhena ν ξ 07h 04m 06h 56m 06h 48m 06h 40m 06h 32m 06h 24m 06h 16m 06h 08m 06h 00m Zone 136, Map 1 Normal Image Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. +25°00' OSS 74 STF 889 STF 860 IC 2156-7 Kustner 89 Pourteau 856 Pourteau 849 Pourteau 1245 Couteau 85 OS 134 M35 NGC 2168 IC 2156, 2157 NGC 2158 +24°00' A. G. 107 OSS 70 8 Gem Pourteau 1244 Collinder 89 Jonckheere 341 H IV 48 NGC 2129 1 Gem Taur +23°00' STF 886 12 Gem IC 443 Eta Gemη Orio Propus OS 125 +22°00' Hussey 452 Fox 9 Gemini A. G. 109 06h 18m 06h 12m 06h 06m 06h 00m Zone 136, Map 1 Mirror Image STF 889 STF 860 A. G. 107 OS 134 Couteau 85 M35 NGC 2168 IC 2156, 2157 +24°00' Kustner 89 IC 2156-7 Pourteau 856 Pourteau 849 +25°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. NGC 2158 OSS 70 8 Gem Collinder 89 NGC 2129 STF 886 Jonckheere 341 1 Gem 12 Gem +23°00' H IV 48 Taurus IC 443 Orion η OS 125 Fox 9 Gemini 06h 06m 06h 12m 06h 18m +22°00' Eta Gem OS 125 06h 00m Propus Zone 136, Map 2 Normal Image Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. A. G. 109 +21°00' Orion NGC 2175S Scardia 37 NGC 2174 NGC 2175 h2306 Scardia 46 +20°00' A. G. 103 χ2 68 Ori Scardia 40 Scardia 38 +19°00' 71 Ori Hipparcos 824 OSS 75 06h 18m 06h 12m 06h 06m 06h 00m Zone 136, Map 2 Mirror Image Orion +21°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. NGC 2175S Scardia 37 NGC 2174 NGC 2175 h2306 Scardia 46 A. G. 103 +20°00' χ2 68 Ori Scardia 40 71 Ori +19°00' Scardia 38 Hipparcos 824 06h 00m 06h 06m 06h 12m 06h 18m Zone 136, Map 3 Normal Image Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. +18°00' Hipparcos 824 OSS 75 +17°00' STF 867 A 2044 H VI 114 H V 23 06h 18m +16°00' A 2447 06h 12m ν 06h 06m 06h 00m Zone 136, Map 3 Mirror Image Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. +18°00' Hipparcos 824 +17°00' STF 867 A 2044 +16°00' A 2447 H VI 114 06h 00m 06h 06m ν H V 23 06h 12m 06h 18m Zone 136, Map 4 Normal Image h392 OSS 74 Mebsuta STF 889 Pourteau 1891 A. G. 112 Hough 625 Pourteau 1245 h390 PK 189+ 7.1 Pourteau 1883 A. G. 119 Fox 149 Pourteau 1976 STF 942 8 Gem Pourteau 1244 Giacobini 20 Collinder 89 STF 886 Jonckheere 341 12 Gem Doolittle 36 IC 443 Osborn 3 Hough 514 Couteau 472 µ +24°00' OS 155 Pourteau 1912 Jonckheere 1968 +23°00' ε +25°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. Eta Gemη Mu Gem Propus +22°00' Hussey 452 South 524 Fox 9 Weisse 12 South 513 +21°00' A. G. 109 Orion h2320 15 Gem h2306 Scardia 46 Nu Gemν Bochum 1 06h 45m 06h 40m 06h 35m 06h 30m 06h 25m 06h 20m 06h 15m Zone 136, Map 4 Mirror Image h392 OSS 74 STF 889 ε Mebsuta +25°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. Pourteau 1891 Pourteau 1245 A. G. 107 A. G. 112 Hough 625 Pourteau 1912 Jonckheere 1968 +24°00' h390 PK 189+ 7.1 8 Gem STF 942 Giacobini 20 Jonckheere 341 STF 886 12 Gem Doolittle 36 IC 443 η Pourteau 1883 A. G. 119 Fox 149 +23°00' Pourteau 1244 Collinder 89 Pourteau 1976 Osborn 3 Propus µ Eta Gem Hough 514 Mu Gem +22°00' Hussey 452 South 524 Fox 9 Weisse 12 Orion +21°00' A. G. 109 South 513 h2320 15 Gem h2306 Scardia 46 ν Nu Gem Bochum 1 06h 15m 06h 20m 06h 25m 06h 30m 06h 35m 06h 40m 06h 45m Zone 136, Map 5 Normal Image Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. +20°00' h2306 Scardia 46 Nu Gemν Bochum 1 +18°00' 71 Ori OSS 75 OS 141 PK 194+2.1 20 Gem +19°00' STF 947 Gemini STF 899 Barton 1208 +17°00' Orion OS 143 Hough 233 Alhena A 2447 H V 23 OS 519 OS 145 Kustner 27 06h 45m 06h 40m A. G. 327 STF 913 OS 140 STF 932 06h 35m 06h 30m 06h 25m 06h 20m 06h 15m +16°00' Gamma Gem γ Zone 136, Map 5 Mirror Image Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. ν Nu Gem +20°00' h2306 Scardia 46 Bochum 1 +19°00' STF 947 +18°00' 71 Ori OSS 75 Gemini OS 141 PK 194+2.1 20 Gem STF 899 Barton 1208 +17°00' Orion OS 143 A 2044 Hough 233 γ +16°00' H V 23 STF 913 OS 140 OS 145 OS 519 STF 932 06h 15m Alhena Gamma Gem A 2447 06h 20m 06h 25m 06h 30m 06h 35m A. G. 327 06h 40m Kustner 27 06h 45m Zone 136, Map 6 Normal Image Epsilon Gemε STF 1000 Mebsuta A 513 STF 991 OS 164 rej +25°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. Pourteau 1912 Pourteau 2117 Pourteau 1891 Hough 625 ω PK 189+ 7.1 Pourteau 2032 Pourteau 2094 Doolittle 37 h402 Pourteau 2072 h408 Pourteau 1976 STF 942 Giacobini 20 +23°00' Pourteau 1883 A. G. 119 Fox 149 Pourteau 2133 +24°00' h409 Jonckheere 1968 OS 155 Doolittle 36 +22°00' Couteau 472 Hussey 454 OS 161 rej +21°00' Soulie 395 OS 160 ζ Mekbuda Zeta Gem Hough 27 07h 05m 07h 00m 06h 55m 06h 50m 06h 45m 06h 40m 06h 35m Zone 136, Map 6 Mirror Image ε STF 1000 Mebsuta Epsilon Gem A 513 STF 991 Pourteau 1912 Hough 625 +25°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. OS 155 Jonckheere 1968 Pourteau 1891 h409 Pourteau 2117 PK 189+ 7.1 Pourteau 2032 Pourteau 2094 STF 942 Pourteau 2133 Doolittle 37 Pourteau 1883 Pourteau 1976 A. G. 119 Fox 149 h408 h402 Pourteau 2072 Doolittle 36 +23°00' Giacobini 20 +24°00' ω +22°00' Couteau 472 South 524 +21°00' OS 161 rej OS 160 Zeta Gemζ Mekbuda Hough 27 06h 35m 06h 40m 06h 45m 06h 50m 06h 55m 07h 00m 07h 05m Zone 136, Map 7 Normal Image +20°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. Hough 27 +19°00' STF 947 Jonckheere 728 Bur 899 +18°00' STF 976 NGC 2304 +17°00' Barton 1208 Alhena +16°00' Gamma Gem γ OS 162 Jonckheere 2035 Kustner 27 A. G. 327 Hough 239 07h 05m 07h 00m 06h 55m 06h 50m 06h 45m 06h 40m 06h 35m Zone 136, Map 7 Mirror Image +20°00' Sky charts generated by TheSky Software; used by permission of Software Bisque Inc. Hough 27 +19°00' STF 947 +18°00' Bur 899 STF 976 NGC 2304 +17°00' Barton 1208 γ Alhena +16°00' Gamma Gem OS 162 STF 932 06h 35m A. G. 327 Kustner 27 Hough 239 06h 40m 06h 45m 06h 50m 06h 55m 07h 00m 07h 05m Zone 136 Index 86 Double Stars, 1 Nebula, 2 Planetary Nebulae, 1 Supernova Remnant, 9 Open Clusters Flamsteed Doolittle 37 .......................................... 49 1 Gem .................................................... 8 12 Gem .................................................. 4 15 Gem ................................................ 26 20 Gem ................................................ 38 68 Ori................................................... 18 71 Ori................................................... 19 8 Gem .................................................... 5 E Eta Gem ............................................... 10 F Fox 149 ................................................ 32 Fox 9 ...................................................... 5 A G A 2044 ................................................. 22 A 2447 ................................................. 23 A 513 ................................................... 50 A. G. 103 ............................................. 16 A. G. 107 ............................................... 7 A. G. 109 ............................................. 27 A. G. 112 ............................................. 28 A. G. 119 ............................................. 30 Gamma Gem ........................................ 41 Giacobini 20......................................... 29 H H IV 48 .................................................. 6 H V 23.................................................. 23 H VI 114 .............................................. 22 h2306 ................................................... 19 h2320 ................................................... 33 h390 ..................................................... 33 h402 ..................................................... 51 Hipparcos 824 ...................................... 16 Hough 233............................................ 46 Hough 27.............................................. 52 Hough 514............................................ 36 Hough 625............................................ 34 Hussey 452............................................. 5 B Barton 1208 ......................................... 45 Bochum 1............................................. 47 Bur 899 ................................................ 55 C Collinder 89 ......................................... 12 Couteau 472......................................... 53 Couteau 85............................................. 7 I D IC 2156-7 ............................................. 13 IC 443 .................................................. 14 Doolittle 36 .......................................... 29 -1- Zone 136 J PK 194+2.1 .......................................... 48 Pourteau 1244 ...................................... 32 Pourteau 1245 ...................................... 30 Pourteau 1883 ...................................... 31 Pourteau 1891 ...................................... 31 Pourteau 1912 ...................................... 34 Pourteau 1976 ...................................... 32 Pourteau 2032 ...................................... 49 Pourteau 2072 ...................................... 50 Pourteau 2094 ...................................... 48 Pourteau 2117 ...................................... 51 Pourteau 2133 ...................................... 49 Pourteau 849 .......................................... 6 Pourteau 856 .......................................... 7 Jonckheere 1968 .................................. 35 Jonckheere 341 ...................................... 9 K Kustner 89.............................................. 8 M Mu Gem............................................... 25 N NGC 2129............................................ 13 NGC 2158............................................ 14 NGC 2168............................................ 11 NGC 2174............................................ 20 NGC 2175............................................ 21 NGC 2175S.......................................... 20 NGC 2304............................................ 55 Nu Gem................................................ 36 S Scardia 37 ............................................ 17 Scardia 38 ............................................ 17 Scardia 40 ............................................ 18 Scardia 46 ............................................ 19 South 513 ............................................. 27 South 524 ............................................. 26 STF 860.................................................. 3 STF 867................................................ 24 STF 886.................................................. 9 STF 899................................................ 44 STF 913................................................ 40 STF 942................................................ 35 STF 947................................................ 43 STF 976................................................ 54 STF 991................................................ 52 O OS 125 ................................................. 10 OS 134 ................................................... 3 OS 140 ................................................. 45 OS 141 ................................................. 44 OS 143 ................................................. 40 OS 145 ................................................. 46 OS 155 ................................................. 37 OS 160 ................................................. 53 OS 161 rej............................................ 51 OS 519 ................................................. 41 Osborn 3 .............................................. 33 OSS 70................................................... 4 OSS 75................................................. 39 W Weisse 12............................................. 29 P PK 189+ 7.1......................................... 38 -2- Zone 136 Zone 136, Map 1 Double Stars Easy STF 860 Rating: 2 E ADS 4777; HD 42332; SAO 78069 Position: 0611+2453 A B Magnitude 8.39 9.85 Separation PA — — 5.9 + 357 - Year — 1991 Spectra B9 F8 Colors bW pB Notes: 1832: 5.7 @ 359. 18 measurements. Observations: C11 at 115x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 5.15 inches; B = 16.6 inches. Separation: AB = 73.7 miles. Distance (LY): 8,000 Total luminosity (Suns): 2,780 OS 134 Rating: 3 E ADS 4744; HD 41996 Position: 0609+2426 A B Magnitude 7.42 8.99 Separation PA — — 30.9 189 = Year — 1988 Spectra G0 Colors O B Notes: 1843: 31.4 @ 189. 21 measurements. The stars have similar proper motions. -3- Zone 136 Observations: C8 at 83x. It lies on the NE edge of M35. 12 Gem Rating: 3 E HD 43836; SAO 78225; H V 55 Position: 0619+2316 A B C Magnitude 6.95 10.28 10.30 Separation — 61 63 PA — 60 59 Year — 1988 Spectra A0 III Colors W pB W Observations: C8 at 83x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 19.2 inches. Separation: AB = 819 miles; AC = 846 miles. Distance (LY): 8,600 Total luminosity (Suns): 9,780 OSS 70 Rating: 4 E HD 42871; SAO 78121 Position: 0614+2359 A B Magnitude 7.53 7.88 Separation PA — — 114.3 178 = Year — 1997 Notes: 1875: 116.5 @ 178. 21 measurements. The stars have a small difference in proper motion. Observations: C8 at 104x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 10.1 inches. Separation: AB = 127 miles. Distance (LY): 710 Total luminosity (Suns): 63 -4- Spectra F0 Colors W Y Zone 136 8 Gem Franks; HD 43261; SAO 78168 Position: 0616+2358 A B Magnitude 7.00 7.50 Rating: 4 E Separation PA — — 117 178 Year — 1914 Spectra Colors W W Observations: C8 at 104x. Distance (LY): 436 Total luminosity (Suns): 39 Fox 9 Rating: 4 E ADS 4899; HD 254657 Position: 0618+2151 A B Magnitude 10.51 10.70 Separation PA — — 5.1 178 = Year — 1946 Spectra Colors W W Notes: 1894: 5.3 @ 178. 6 measurements. Observations: C11 at 115x. Hussey 452 Rating: 4 E ADS 4931 Position: 0620+2218 A B Magnitude 9.47 10.82 Separation PA — — 2.7 + 343 + Notes: 1902: 2.6 @ 341. 11 measurements. Observations: C11 at 115x! -5- Year — 1991 Spectra B1.5 V Colors W yW Zone 136 H IV 48 Rating: 5 E ADS 4590; HD 250289; SAO 77839 Position: 0601+2320 A B Magnitude 8.23 9.67 Separation PA — — 31.4 + 259 = Year — 1911 Spectra B2 IIIe Colors W B Notes: 1783: 31.3 @ 259. 5 measurements. Observations: C8 at 104x. It lies in the N central part of the open cluster NGC 2729. Scale model (in which the Sun is the size of a baseball): Diameter: A = 15.0 inches. Separation: AB = 87.2 miles. Distance (LY): 1,780 Total luminosity (Suns): 133 Pourteau 849 Pourteau 850 (C Position: 0602+2440 A B C Magnitude 9.98 11.90 13.20 Rating: 5 E Separation — 21.7 + 8.6 + PA — 0+ 89 - Year — 1954 1954 Spectra Notes: AB 1894: 21.0 @ 353. 3 measurements. AC 1902: 7.9 @ 96. 3 measurements. Observations: C11 at 115x. It is the east-central star of a bent 6-star "rectangle." -6- Colors O W? ? Zone 136 Pourteau 856 Pourteau 857 (C) Position: 0603+2447 A B Magnitude 11.06 12.68 Rating: 5 E Separation PA — — 15.6 + 241 -!! Year — 1991 Spectra Colors W ? Notes: 1926: 15.4 @ 346. 3 measurements. Observations: C11 at 115x. C was not detected. Moderate A. G. 107 Rating: 3 M ADS 4810 Position: 0613+2426 A B Magnitude 9.56 9.82 Separation PA — — 1.4 = 179 - Year — 1991 Spectra A0 Colors W W Notes: 1901: 1.4 @ 180. 17 measurements. Observations: C11 at 339x. Duplicity was suspected at 115x. Couteau 85 Position: 0609+2424 A B Magnitude 9.14 10.05 Rating: 4 M Separation PA — — 1.9 + 334 +? Year — 1991 Spectra Notes: 1966: 1.3 @ 104. 2 measurements. Is there a quadrant reversal? -7- Colors Y Y Zone 136 Observations: C11 at 339x. It formed a snowman at 339x. It was split at 634x. Kustner 89 Sinachopoulos 17 (C) Position: 0603+2450 A B C Magnitude 10.39 12.40 12.20 Rating: 5 M Separation — 15.0 216.3 PA — 271+ 83 Year — 1987 1989 Spectra F5 Colors W ? ? Notes: AB 1902: 16.9 @ 239. 3 measurements. AC 1 measurement. Observations: C11 at 115x. 1 Gem Bur 1405; Kuiper 23 (B); HD 41116; SAO 77915 Position: 0604+2316 A B Magnitude 4.16 13.00 Separation PA — — 101.0 + 25 - Rating: 5 M Year — 1959 Spectra G7 III Colors Y!! ? Notes: 1911: 96.6 @ 26. 2 measurements. Kuiper found a 4.89m companion to A in 1948 at only 0.2 @ 187. It was last measured at 0.1 @ 72 (1996). B is a spectroscopic binary, Period is 9.6d, and A is reported to be an occultation binary. Evidently both visual components are giants with one, probably the later type component, double once more. Period is 13.35 years, semimajor axis of 0.20", direct motion. Observations: C11 at 115x. B was not seen at any power. Good color saturation in A. -8- Zone 136 Scale model (in which the Sun is the size of a baseball): Diameter: A = 3.00 inches. Separation: AB = 23.8 miles. Distance (LY): 151 Total luminosity (Suns): 58 Jonckheere 341 Rating: 5 M ADS 4877 Position: 0617+2318 A B C Magnitude 10.97 11.00 11.79 Separation — 1.7 + 21.6 PA — 144 189 Year — 1955 1955 Spectra Colors W W W Notes: AB 1911: 1.5 @ 149. 5 measurements. AC 1 measurement. Observations: C11 at 339x. A 9m O star is 8 min SW. STF 886 Rating: 5 M ADS 4914 Position: 0619+2317 A B Magnitude 9.86 12.40 Separation PA — — 5.8 189 + Year — 1929 Notes: 1831: 6.8 @ 182. 9 measurements. Observations: C11 at 115x. Distance (LY): 96 Total luminosity (Suns): 0.09 -9- Spectra Colors yO ? Zone 136 Difficult OS 125 Rating: 5 D ADS 4577; HD 40423 Position: 0600+2228 A B Magnitude 7.75 8.89 Separation PA — — 1.4 + 0- Year — 2000 Spectra A0 III Colors Y Y Notes: 1843: 1.3 @ 2. 32 measurements. Observations: C8 at 280x. Notched. Webb saw A as R. Scale model (in which the Sun is the size of a baseball): Diameter: A = 5.60 inches. Separation: AB = 3.76 miles. Distance (LY): 1,720 Total luminosity (Suns): 259 Eta Gem 7 Gem; Propus; Bur 1008; ADS 4841; HD 42995; SAO 78135 Position: 0615+2230 A B Magnitude 3.31 8.80 Separation PA — — 1.6 + 259 - Year — 1998 Rating: 5 D Spectra M3 IIIv G8 I Colors yG? W Notes: 1881: 1.1 @ 300. 89 measurements. The orbital period is 473.7 years (Baize, 1980). A has 12.4 solar masses while B has 5.5. A is a semi-regular variable with a period of around 233 days and 0.9 change in magnitude. It is also a spectroscopic binary with a 8.17 year period, as well as an occultation binary. It is embedded in a cloud of cold gas 300 astronomical units in diameter. It is also an infra-red source. Semi-regular variables tend to be giant or supergiant pulsating stars with amplitudes of 1 or 2 magnitudes. The periods range anywhere from a few days to several years. The light curves are not smooth. - 10 - Zone 136 There are at least 4 sub-types of semi-regular variables. Types a and b are red giants of spectral class M, C or S. The a sub-type has stable periods, the b-type ill-defined periods. The c sub-type are red supergiants (like Betelgeuse, Antares, and Mu Cep), while the d sub-types are bright yellow giants and supergiants of classes F, G or K. Near here, William Herschel discovered Uranus on March 13, 1781. Observations: C8 at 280x. Notched. Webb wrote, "Glorious sweeping here." Scale model (in which the Sun is the size of a baseball): Diameter: A = 31.4 inches; B = 26.0 inches. Separation: AB = 4,594 feet; Aa = 109 feet. Distance (LY): 349 Total luminosity (Suns): 473 Deep Sky Objects Easy NGC 2168 Rating: 2 E Other Names: Melotte 41; Raab 31, M35 Astronomical Leage Program: Messier Club, Urban Deep Sky Club Position: 0609+2420 Type: Oc Dimensions: 28' Class: III 3r Cluster population: 200 Magnitude: 5.1 Notes: It was discovered by J. Bevis in 1745; de Cheseaux mentioned it in 1745, and Messier added it to his list on August 30, 1764. Lord Rosse counted 300 stars in this cluster and modern counts go up to 434 stars. The brightest star (orange) is 8.2m (300 times brighter than the Sun). It is 30 light years in diameter and 110 million years old while the earliest spectral types are B3 and B4. - 11 - Zone 136 Observations: C8 at 83x. Extremely good! There are many R stars. Glenn Bock writes that the cluster is "somewhat doughnut shaped with a dark 'hole' in the center," a vivid description that is fitting. C11 at 115x. I would rate it a "1" with the C11! Bright Y star at the NE end; an O star just N of the center; a rO star just S of the center. Center is strangely empty. Model (where the Sun is a baseball): Its diameter would be 7,080 miles, with the stars 606 miles apart. NGC 2168 (M35) Open cluster (III 3 r; 200 stars) Observed with C8 on 1/30/92 Magnification: 80x Distance (LY): 2,700 Luminosity (suns): 5,200 Collinder 89 Rating: 5 E Position: 0618+2338 Type: Oc Dimensions: 35' Class: IV 2pn Cluster population: 15 Magnitude: 5.7 Notes: It is 43 light years in diameter. Observations: C8 at 83x. Poor, and very spread out. It is not much denser than the field. Model (where the Sun is a baseball): Its diameter would be 13,850 miles, while its stars would be 2,810 miles apart. Distance (LY): 2,600 Luminosity (suns): 2,780 - 12 - Zone 136 Moderate NGC 2129 Other Names: Collinder 77; H VIII 26 Astronomical League Program: Herschel 400 Club Rating: 4 M Position: 0601+2318 Type: Oc Dimensions: 6' Class: I 3m Cluster population: 50 Magnitude: 6.7 Notes: This is a young group, being only about 41 million years old. Its youngest stars are B1 types, and there is at least one Be star. The brightest star is 10m (330 times brighter than the Sun). The magnitude without the two brightest stars is 8.2. This cluster lies 34,000 light years from the galactic center and 10 light years above the galactic plane. Observations: C8 at 104x. It shows a grainy center with averted vision. Note the 8m-9m triangle at the center. C11 at 115x. Dominated by two bright W stars at the center. 24 other stars counted. Being close to the ecliptic, this cluster is sometimes occulted by solar system objects. Model (where the Sun is a baseball): Its diameter would be 3,650 miles, with the stars being 500 mi apart. Distance (LY): 4,940 Luminosity (suns): 4,000 IC 2156-7 Other Names: Collinder 80 Rating: 5 M Position: 0605+2409 Type: Oc Dimensions: 7' Class: III 2p Cluster population: 20 Magnitude: 8.4 Notes: The brightest star is 11.1m (120 times brighter than the Sun). The cluster is 13 light years in diameter. - 13 - Zone 136 Observations: C8 at 83x. Note the 9m O star on the S edge, and some nebulosity. Orange SAO 77971 (6.9m) lies 33 min SE. It hardly stands out in the field. Model (where the Sun is a baseball): Its diameter would be 4,260 miles. Its stars are 770 mi apart. Distance (LY): 6,500 Luminosity (suns): 1,450 IC 443 Rating: 5 M Position: 0617+2247 Type: SNR Dimensions: 50' x 40' Class: E Magnitude: 9.0 Notes: The supernova that created IC 443 probably occurred some 3,000 years ago. As the shock and debris from the explosion spread outward it met a nearby molecular cloud complex. The interaction resulted in the filimentary structure we see in photographs. A molecular cloud complex is a region of cold, high-density gas. It is out of such cloud complexes that stars can form, sometimes triggered by the passing shock of a nearby supernova. Interestingly, the remains of a much older supernova remnant (possibly as old as 100,000 years) can be seen in silhouette in x-ray images. [Source: http://www.skyhound.com/sh/archive/jan/IC_443.html] Observations: C8 at 104x. It is just a region where the skyglow gets perceptibly brighter. Difficult NGC 2158 Other Names: Melotte 40; Collinder 81; Raab 30; H VI 17 Astronomical League Program: Herschel 400 Club Rating: 5 D Position: 0608+2406 Type: Oc Dimensions: 5' Class: II 3r Cluster population: 973 - 14 - Magnitude: 8.6 Zone 136 Notes: It is 3.2 billion years old. The earliest spectral type is F0. The brightest star is 15m. It lies on the outer edge of the galaxy, being 40,000 light years from the galactic center and 390 light years above the galactic plane. It is thought by some astronomers to be a very small globular cluster. Observations: C8 at 83x. It is an unresolved grainy patch on the SW edge of M35— tough, but worth the hunt. Use high power, but don't expect too much resolution. C11 at 193x. Five stars with a nebulous or grainy background. Model (where the Sun is a baseball): Its diameter would be 7,500 miles, with its stars 378 miles apart. Distance (LY): 16,000 Luminosity (suns): 7,300 - 15 - Zone 136 Zone 136, Map 2 Double Stars Easy Hipparcos 824 Rating: 3 E HD 41101; SAO 95174 Position: 0604+1816 A B Magnitude 7.80 8.97 Separation PA — — 2.3 = 148 = Year — 1999 Spectra B8 Colors W W Notes: 1991: 2.3 @ 148. 3 measurements. Observations: C11 at 115x. Nice field! Scale model (in which the Sun is the size of a baseball): Diameter: A = 4.22 inches. Separation: AB = 5.67 miles. Distance (LY): 1,580 Total luminosity (Suns): 200 A. G. 103 Position: 0601+2014 A B Magnitude 9.11 10.68 Rating: 4 E Separation PA — — 15.2 + 103 + Notes: 1902: 14.4 @ 100. 3 measurements. Observations: C8 at 104x. Moderate field. - 16 - Year — 1989 Spectra B3 V Colors W bW Zone 136 Scale model (in which the Sun is the size of a baseball): Diameter: A = 12.6 inches. Separation: AB = 2.39 miles. Distance (LY): 101 Total luminosity (Suns): 0.224 Scardia 37 Rating: 4 E HD 252559 Position: 0610+2032 A B Magnitude 10.29 10.33 Separation PA — — 24.8 95 +? Year — 1991 Spectra Colors W W Notes: 1895: 25.4 @ 276. 6 measurements. Quadrant reversal? The stars have different proper motions. Observations: C11 at 115x. Scardia 38 Rating: 4 E HD 252899; SAO 95339 Position: 0611+1913 A B C Magnitude 8.68 11.36 11.11 Separation — 42.7 + 73.1 + PA — 286 268 = Year — 1985 1985 Spectra K0 Notes: AB 1895: 41.2 @ 288. 3 measurements. AC 1895: 72.1 @ 268. 3 measurements. Observations: C8 at 104x. BC looks very nice together, though faint. Moderate field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 25.3 inches. Separation: AB = 19.3 miles; AC = 33.0 miles. Distance (LY): 289 Total luminosity (Suns): 2.8 - 17 - Colors Y ? W Zone 136 68 Ori Rating: 4 E HD 42509; SAO 95359; H VI 72 Position: 0612+1947 A B Magnitude 5.74 9.36 Separation PA — — 89.8 + 205 - Year — 1991 Spectra B9 V Colors bW W Notes: 1895: 85.3 @ 217. 12 measurements. The stars have different proper motions. Observations: C8 at 104x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 9.60 inches. Separation: AB = 136 miles. Distance (LY): 970 Total luminosity (Suns): 374 Scardia 40 Rating: 5 E HD 253187; SAO 95367 Position: 0612+1926 A B Magnitude 9.55 11.63 Separation PA — — 32.3 198 Year — 1986 Notes: 1 measurement. Observations: C8 at 104x. An 8m star is 7 min N. Scale model (in which the Sun is the size of a baseball): Diameter: A = 21.2 inches. Separation: AB = 2.52 miles. Distance (LY): 50 Total luminosity (Suns): 0.034 - 18 - Spectra G5 Colors Y W Zone 136 h2306 Rating: 5 E ADS 4894 Position: 0618+2016 A B Magnitude 10.53 10.84 Separation PA — — 4.3 + 32 + Year — 1991 Spectra Colors W W Notes: 1894: 3.9 @ 25. 6 measurements. Observations: C11 at 115x. Distance (LY): 139 Total luminosity (Suns): 0.162 Scardia 46 Position: 0618+2013 A B Magnitude 10.59 10.85 Rating: 5 E Separation PA — — 28.4 + 200 + Year — 1985 Spectra Colors W W? Notes: 1894: 27.8 @ 199. 5 measurements. Hipparcos gives discordant distances: 43 light years and 35. The stars also have different proper motions. Observations: C11 at 115x. Moderate 71 Ori h2302; ADS 4842; HD 43042; SAO 95432 Position: 0615+1909 A B C D Magnitude 5.20 11.20 10.50 10.00 Separation — 25.4 +!! 76.1 85.8 - Rating: 4 M PA — 202 269 + 255 + - 19 - Year — 1922 1923 1922 Spectra F5 V Colors W ? W W Zone 136 Notes: AB 1830: 60.0 @ 220. 8 measurements. AC 1886: 80.7 @ 265. 3 measurements. AD 1886: 91.2 @ 252. 4 measurements. Observations: C8 at 83x. You'll need averted vision for all the companions. Rich field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 4.35 inches. Separation: AB = 2.73 miles; AC = 8.19 miles; AD = 9.23 miles. Distance (LY): 69 Total luminosity (Suns): 3.18 Deep Sky Objects Moderate NGC 2175S Rating: 4 M Position: 0611+2036 Type: Oc Cluster population: 20 Class: n Magnitude: 6.8 Observations: C8 at 206x. Seven stars, and rather sparse. The cluster lies just NW of an 8.8m field star and is roughly triangular in shape. NGC 2174 Rating: 5 M Position: 0610+2030 Type: Gn Dimensions: 30' x 25' Class: E Magnitude: 7.4 - 20 - Zone 136 Observations: C8 at 83x. A N to S bar, with the S end being the brightest. It surrounds NGC 2175. Sentinel, AZ; A. J. Crayon's 14-inch Dob at 60x. Large, irregular nebula, about 30 min in diameter, splotchy. Open cluster involved? Adding a UHC brought out tremendous detail in the nebula, enhancing its size and splotchy character, and showing dark lanes and twists. 22 stars noted. The view with an O-III was even better! V shape. Distance (LY): 3,260 Difficult NGC 2175 Other Names: Collinder 84 Rating: 5 D Position: 0609+2019 Type: Oc Dimensions: 18' Class: III 3rn Cluster population: 60 Magnitude: 6.8 Notes: This cluster may be part of the Gemini OB1 association. It is only a million years old and its youngest star is an O6 type. It lies 36,000 light years from the galactic center and 62 light years above the galactic plane. Observations: C8 at 83x. Very, very faint and grainy; I could only glimpse it with averted vision. An 8m star lies inside. Model (where the Sun is a baseball): Its diameter would be 10,790 miles, with stars 1,360 miles apart. Distance (LY): 5,300 Luminosity (suns): 4,200 - 21 - Zone 136 Zone 136, Map 3 Double Stars Easy H VI 114 Rating: 3 E HD 42233; SAO 95321 Position: 0610+1554 A B Magnitude 7.40 10.30 Separation PA — — 54.8 + 106 - Year — 1979 Spectra G5 Colors yW pB Notes: 1903: 54.7 @ 108. 7 measurements. Observations: C8 at 83x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 18.6 inches. Separation: AB = 52.2 miles. Distance (LY): 610 Total luminosity (Suns): 32 A 2044 Rating: 4 E ADS 4843; HD 253926; SAO 95438 Position: 0615+1649 A B Magnitude 8.57 9.65 Separation PA — — 63.9 183 = Year — 1991 Spectra F0 Colors W pR Notes: 1902: 64.4 @ 183. 8 measurements. A has a 9.5m companion at 0.4 @ 34 (1995), and B has a 14.0m companion at 4.8 @ 13 (1921). - 22 - Zone 136 Observations: C8 at 104x. Rich, bright field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 10.8 inches. Separation: AB = 45.8 miles; Aa = 1,513 feet; Bb = 3.44 miles. Distance (LY): 459 Total luminosity (Suns): 7 A 2447 Rating: 4 E ADS 4860; HD 254053; SAO 95450 Position: 0616+1614 A B Magnitude 8.97 11.05 Separation PA — — 34.3 + 310 = Year — 1920 Spectra A3 III Colors W ? Notes: 1912: 33.8 @ 310. 2 measurements. A has a 13.0m companion at 4.0 @ 306 (1920). Observations: C8 at 104x. Rich, bright field. A 6m W star is 10 min S. Scale model (in which the Sun is the size of a baseball): Diameter: A = 8.40 inches. Separation: AB = 6.26 miles. Distance (LY): 117 Total luminosity (Suns): 0.314 Moderate H V 23 Rating: 4 M HD 43496; SAO 95486 Position: 0617+1551 A B Magnitude 7.30 10.60 Separation PA — — 44.9 + 230 + - 23 - Year — 1906 Spectra B9 II Colors bW B Zone 136 Notes: 1903: 44.6 @ 229. 3 measurements. The Tycho-2 Catalogue indicates a single star entry. Observations: C8 at 83x. Use averted vision. Scale model (in which the Sun is the size of a baseball): Diameter: A = 10.2 inches. Separation: AB = 124 miles. Distance (LY): 1,770 Total luminosity (Suns): 314 Difficult STF 867 Guillaume 10 (C); ADS 4789; HD 42476; SAO 95354 Position: 0612+1723 A B Magnitude 7.53 8.88 Separation — 2.2 = 74.5 - PA — 159 + 35 + Notes: AB 1831: 2.2 @ 156. 37 measurements. AC 1896: 76.6 @ 33. 6 measurements. Observations: C8 at 206x. - 24 - Year — 1997 1980 Rating: 4 D Spectra B9.5 III Colors W Y No Zone 136 Zone 136, Map 4 Double Stars Easy Mu Gem 13 Gem; Tejat; Bur 1059; ADS 4990; HD 44478; SAO 78297 Position: 0623+2231 A B C D BC Magnitude 2.87 10.49 10.70 Separation PA — — 121.7 141 = 72.7 0.6 - 77 265 - Year — 1899 1944 1880 Rating: 2 E Spectra M3 IIIv Colors dY!! ? ? No ? Notes: AB 1889: 122.5 @ 141. 2 measurements. AD 1 measurement. BC 1896: 0.8 @ 267. 5 measurements. This star gives off some ultra-violet light as well as infra-red. It is a member of the zeta Hercules Group and has had its diameter determined by occultation (0.0118" to 0.0158"). Observations: C8 at 104x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 1.05 inches. Separation: AB = 44.1 miles; AC = 26.3 miles; BC = 1,147 feet. Distance (LY): 232 Total luminosity (Suns): 297.7 - 25 - Zone 136 15 Gem Sh 70; Hh 223; ADS 5080; HD 45352; SAO 78394 Position: 0628+2047 A B C Magnitude 6.60 8.59 12.40 Separation — 25.9 77.7 PA — 203 34 Rating: 2 E Year — 1994 1911 Spectra K2 III Colors O G ? Notes: 1822: 29 @ 205. 32 measurements. The stars have proper motion in the same direction, but very different values. AC 1 measurement. Observations: C8 at 83x. Star C is very difficult to see. Some observers note W and B. Webb saw W and B. Knott saw Y and V. Scale model (in which the Sun is the size of a baseball): Diameter: A = 49.5 inches. Separation: AB = 23.4 miles; AC = 70.3 miles. Distance (LY): 580 Total luminosity (Suns): 77.29 South 524 Rating: 2 E HD 46401; SAO 78508 Position: 0634+2207 A B C D E BD BE Magnitude 7.18 7.42 10.00 13.00 13.00 Separation — 53.5 104.4 - 39.1 51.8 PA — 244 = 149 = Year — 1991 1988 294 267 1988 1988 - 26 - Spectra A3 A3 Colors W W bW No No Zone 136 Notes: AB 1824: 53.6 @ 244. 26 measurements. The stars share common proper motion. AC 1824: 106.1 @ 149. 10 measurements. Slightly different proper motions. BD and BE, 1 measurement. Observations: C8 at 104x. Moderate field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 7.00 inches; B = 7.12 inches. Separation: AB = 30.8 miles; AC = 60.1 miles; BD = 22.5 miles; BE = 29.8 miles. Distance (LY): 369 Total luminosity (Suns): 27 A. G. 109 Rating: 3 E ADS 4933; HD 43928; Position: 0620+2128 A B Magnitude 9.44 9.67 Separation PA — — 2.3 + 18 - Year — 1995 Spectra G0 Colors W W Notes: 1902: 2.0 @ 22. 18 measurements. Observations: C11 at 115x!! South 513 Rating: 3 E ADS 4962; HD 44171; SAO 78264 Position: 0621+2108 A B C D E Magnitude 7.34 9.11 10.92 7.62 10.50 Separation — 58.2 46.6 +! 265.1 84.0 - PA — 259 + 254 + 24 + 286 +! - 27 - Year — 1997 1962 1991 1987 Spectra B8 A0 Colors G B ? No No Zone 136 Notes: AB 1825: 59.4 @ 258. 22 measurements. Hipparcos/Tycho data show different distances for these stars; they may be optical. Yet they have similar proper motions. AC 1908: 42.0 @ 247. 2 measurements. AD 1914: 265.2 @ 23. 3 measurements. AE 1962: 84.2 @ 255. 2 measurements. Other components not listed: AS 1908: 38.4 @ 295. 1987: 52.2 @ 291. 2 measurements. BT 1908: 38.4 @ 296. 1 measurement. Observations: C8 at 104x. Rich field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 4.09 inches; B = 6.53inches. Separation: AB = 73.6 miles; AC = 58.9 miles; AD = 335 miles; AE = 106 miles. Distance (LY): 810 Total luminosity (Suns): 74 A. G. 112 Opik 12 (C); ADS 5071 Position: 0628+2432 A B C Magnitude 9.83 9.88 11.10 Rating: 3 E Separation — 2.8 = 35 PA — 209 + 330 Notes: AB 1902: 2.8 @ 208. 12 measurements. AC 1926. 1 measurement. Observations: C11 at 193x. AB were nicely split at 115x. Nice field. - 28 - Year — 1991 Spectra A0 Colors W W ? Zone 136 Weisse 12 Rating: 3 E H N 141 Position: 0631+2143 A B Magnitude 8.63 8.70 Separation PA — — 8.5 = 66 + Year — 1991 Spectra F0 Colors W W Notes: 1903: 8.5 @ 64. 19 measurements. Observations: C11 at 115x. Nice field. Giacobini 20 Pourteau 1616 Position: 0637+2335 A B Magnitude 10.61 12.26 Rating: 3 E Separation PA — — 8.0 227 - Year — 1936 Spectra Colors W W Notes: 1922: 8.4 @ 228. 3 measurements. Observations: C11 at 115x. Nice, even if it is faint. Doolittle 36 STF 943 (Aa); SAO 78567 Position: 0638+2311 A B Magnitude 9.17 9.42 Rating: 3 E Separation PA — — 28.9 +! 136 -! Year — 1991 Spectra G0 Colors Y yW Notes: 1829: 15.5 @ 156. 33 measurements. The stars have different proper motions. - 29 - Zone 136 Observations: C11 at 115x. It gets lost in a bright and moderately rich field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 18.1 inches. Separation: AB = 21.0 miles. Distance (LY): 466 Total luminosity (Suns): 6.54 A. G. 119 Rating: 3 E ADS 5395; HD 48471 Position: 0645+2327 A B Magnitude 8.94 9.13 Separation PA — — 1.5 = 84 + Year — 1991 Spectra F8 Colors W W Notes: 1902: 1.6 @ 79. 18 measurements. Observations: C11 at 339x. Duplicity was suspected at 115x. Pourteau 1245 Rating: 4 E HD 255551; SAO 78266 Position: 0621+2431 A B Magnitude 8.65 10.86 Separation PA — — 14.1 24 - Year — 1991 Spectra Notes: 1892: 15.9 @ 35. 4 measurements. Observations: C8 at 104x. It lies in a roughly N-S chain of 9m stars. Distance (LY): 10 Total luminosity (Suns): 0.0033 - 30 - Colors W ? Zone 136 Pourteau 1883 Fox 11; HD 261832 Position: 0641+2336 A B C BC Magnitude 9.47 10.38 11.75 Rating: 4 E Separation PA — — 18.1 25 1.5- Year — 1993 1993 Spectra Colors yW bW No 184= Notes: AB 1892: 18.2 @ 28. 8 measurements. BC 1 measurement. Observations: C11 at 115x. Distance (LY): 144 Total luminosity (Suns): 0.41 Pourteau 1891 Position: 0642+2436 A B Magnitude 10.28 10.40 Rating: 4 E Separation PA — — 6.5 + 5- Year — 1941 Spectra Colors W W Notes: AB 1892: 6.1 @ 6. 3 measurements. Hipparcos gives discordant distances: 33 and 40 light years. The stars have similar proper motions, though. Observations: C11 at 115x. - 31 - Zone 136 Fox 149 Pourteau 1931; ADS 5347 Position: 0643+2320 A B Magnitude 9.55 10.50 Rating: 4 E Separation PA — — 6.6 + 42 - Year — 1925 Spectra Colors W W Notes: 1892: 6.2 @ 38. 5 measurements. Identity with Pourteau 1931 likely; same position, and Pourteau 1901 6.0 @ 38. Observations: C11 at 115x. It lies just E of two brighter stars. Pourteau 1976 Position: 0645+2318 A B Magnitude 9.93 10.70 Rating: 4 E Separation PA — — 8.2 + 293 - Year — 1925 Spectra Colors W ? Notes: 1892: 7.3 @ 296. 2 measurements. Observations: C11 at 115x. Pourteau 1244 Position: 0621+2345 A B Magnitude 10.97 11.14 Rating: 5 E Separation PA — — 15.7 312 Notes: 1 measurement. - 32 - Year — 1925 Spectra Colors W W Zone 136 Observations: C11 at 115x. It is 8 min W of a 9m Y star. Osborn 3 Position: 0623+2244 A B Magnitude 9.86 11.00 Rating: 5 E Separation PA — — 7.9 5 Year — 1950 Spectra Colors W? ? Notes: 1 measurement. Observations: C11 at 115x. h390 Position: 0628+2418 A B Magnitude 10.85 11.51 Rating: 5 E Separation PA — — 14.0 = 47 = Year — 1925 Spectra G5 Colors W W Notes: 1895: 14.0 @ 227. 5 measurements. DSS2 shows that 1895 was a quadrant reversal. Observations: C11 at 115x. It is part of a narrow scalene triangle. h2320 Rating: 5 E ADS 5173; HD 259119; SAO 78474 Position: 0633+2053 A B Magnitude 8.30 10.71 Separation PA — — 8.9 325 + - 33 - Year — 1926 Spectra G5 Colors Y bW Zone 136 Notes: 1874: 9.1 @ 322. 5 measurements. The stars have different proper motions. Observations: C11 at 115x. Hough 625 Rating: 5 E ADS 5270; HD 47176; SAO 78572 Position: 0638+2427 A B C Magnitude 6.75 11.90 9.30 Separation — 13.5 + 47.4 PA — 193 251 Year — 1906 1906 Spectra A5 Colors ? ? ? Notes: AB 1900: 13.4 @ 194. 2 measurements. AC 1 measurement. Observations: C8 at 83x. It lies in the same field as two bright stars. Scale model (in which the Sun is the size of a baseball): Diameter: A = 7.47 inches. Separation: AB = 5.66 miles; AC = 19.9 miles. Distance (LY): 269 Total luminosity (Suns): 12.1 Pourteau 1912 Position: 0642+2441 A B Magnitude 10.49 11.58 Rating: 5 E Separation PA — — 15.7 202 -? Year — 1991 Notes: 1892: 15.8 @ 23. 6 measurements. Quadrant reversal? - 34 - Spectra Colors B ? Zone 136 Observations: C11 at 115x. Jonckheere 1968 Pourteau 1891 Position: 0642+2436 A B Magnitude 10.28 10.40 Rating: 5 E Separation PA — — 6.0 5- Year — 1941 Spectra Colors W W Notes: 1892: 6.1 @ 6. 6 measurements. May be optical because Hipparcos gives different distances (33 and 40 light years). Observations: C8 at 104x. Moderate STF 942 Rating: 3 M ADS 5258; SAO 78563 Position: 0638+2339 A B Magnitude 10.07 10.10 Separation PA — — 3.4 + 246 + Notes: 1830: 3.3 @ 244. 31 measurements. Observations: C8 at 104x. - 35 - Year — 1997 Spectra F0 Colors W W Zone 136 Nu Gem Rating: 4 M 18 Gem; Bur 1192; OSS 77; Bernewitz 1 (a); ADS 5103; HD 45542; SAO 78423 Position: 0629+2013 A B Magnitude 4.13 12.85 Separation PA — — 15.3 263 Year — 1910 Spectra B6 IIIe A1 Colors Y W Notes: 1 measurement. The A star is a spectroscopic binary and a shell star as well. The AxB orbit requires 9.6 years. The system is a member of the Hyades group. Shell stars (also known as Be stars) are irregular variables of spectral type B that show strong emission lines of hydrogen superimposed over a normal absorption spectrum. The emission lines originate in a shell or ring of ejecta thrown off by the star's rapid rotation. They appear to be heavier versions of T Tau stars, and thus may be young stars just approaching the Main Sequence. Burnham found a companion to B (8.7m, 8.8m), 0.15 @ 346. He also found a 15m star at 22.6 @ 358. Observations: C8 at 83x. Webb saw them as bW and yW. Jim Jones (Lake Oswego, OR; 8" SCT)— obtained 112" @ 331 with a MicroGuide (single measurement). Scale model (in which the Sun is the size of a baseball): Diameter: A = 17.4 inches; B = 8.32 inches. Separation: AB = 11.9 miles. Distance (LY): 500 Total luminosity (Suns): 467.18 Difficult Hough 514 Rating: 5 D ADS 5129; HD 45769; SAO 78445 Position: 0630+2233 A B C Magnitude 6.98 12.50 12.80 Separation — 19.7 + 39 PA — 123 35 - 36 - Year — 1927 Spectra A0 Colors W ? ? Zone 136 Notes: AB 1895: 19.3 @ 128. 3 measurements. AC 1895. 1 measurement. Observations: C11 at 115x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 5.72 inches. Separation: AB = 36.6 miles; AC = 72.4 miles. Distance (LY): 1,190 Total luminosity (Suns): 181 OS 155 Rating: 5 D ADS 5409; HD 48640; SAO 78706 Position: 0646+2440 A B Magnitude 6.95 10.89 Separation PA — — 15.5 + 261 + Year — 1925 Notes: 1843: 13.6 @ 260. 13 measurements. Observations: C8 at 83x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 47 feet! Separation: AB = 128 miles. Distance (LY): 5,300 Total luminosity (Suns): 3,790 - 37 - Spectra K2 Ib Colors O B Zone 136 Deep Sky Objects Moderate PK 189+ 7.1 Other Names: M1-7 Rating: 3 M Position: 0637+2401 Type: Pn Dimensions: 38'' x 20'' Class: 2 PA: 140 Magnitude: 13.0 Observations: C8 at 206x. It sits on one leg of a 12m triangle with a NW/SE axis. I could detect no sharp edge, but it does have a very bright center. Distance (LY): 12,400 Total luminosity (Suns): 76 Zone 136, Map 5 Double Stars Easy 20 Gem STF 924; ADS 5166; HD 46136; SAO 95795 Position: 0632+1746 A B C BC Magnitude 6.26 6.91 14.10 Separation PA — — 19.9 + 211 + 47.4 136 - 38 - Rating: 1 E Year — 1991 1913 Spectra F8 III F6 IV/V Colors Y W? No Zone 136 Notes: AB 1822: 19.5 @ 208. 77 measurements. The stars have common proper motion. BC 1 measurement. The primary is an occultation double. Observations: C8 at 83x. Very nice! Some observers report pY and pB. Webb saw Y and bW, and wrote that this is in a "fine field." Scale model (in which the Sun is the size of a baseball): Diameter: A = 30.6 inches; 12.7 inches. Separation: AB = 11.0 miles. Distance (LY): 354 Total luminosity (Suns): 47 OSS 75 Rating: 3 E HD 44073; SAO 95554 Position: 0621+1803 A B Magnitude 7.58 8.88 Separation PA — — 47.1 129 + Year — 1991 Spectra G7 III K0 Colors yW pO Notes: 1876: 47.5 @ 127. 15 measurements. The stars share common proper motion. However, Hipparcos shows different distances (1,520 and 9,320 light years). Observations: C8 at 83x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 3.00 inches; B = 25.6 inches. Separation: AB = 112 miles. Distance (LY): 1,520 Total luminosity (Suns): 250 - 39 - Zone 136 OS 143 Fox 147 (C); ADS 5146 Position: 0631+1656 A B C Magnitude 6.30 9.40 11.41 Rating: 3 E Separation — 8.0 + 44.8 + PA — 102 = 344 + Year — 1961 1956 Spectra K2 III K0 Colors Y R No Notes: AB 1843: 7.4 @ 102. 18 measurements. AC 1911: 42.6 @ 343. 5 measurements. Optical. A is a spectroscopic binary. Observations: C8 at 83x. STF 913 Rating: 4 E HD 45430; SAO 95708 Position: 0628+1542 A B Magnitude 8.40 10.20 Separation PA — — 31.2 49 + Year — 1980 Notes: 1829: 31.3 @ 48. 6 measurements. Observations: C8 at 104x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 5.15 inches. Separation: AB = 79.9 miles. Distance (LY): 1,640 Total luminosity (Suns): 118 - 40 - Spectra B9 Colors bW W Zone 136 OS 519 Rating: 4 E ADS 5152; HD 45994 Position: 0631+1543 A B Magnitude 8.25 10.58 Separation PA — — 8.2 + 79 + Year — 1934 Spectra G5 Colors yO dB Notes: 1847: 8.0 @ 77. 6 measurements. Observations: C8 at 104x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 19.7 inches. Separation: AB = 11.9 miles. Distance (LY): 930 Total luminosity (Suns): 34 Gamma Gem Rating: 5 E 24 Gem; Alhena, "the proudly marching one"; HD 47105; SAO 95912; H V 71 Position: 0638+1624 A B C Magnitude 1.93 11.20 10.90 Separation — 135.5 + 143.5 + PA — 295 = 335 - Year — 1907 1907 Spectra A0 IV Colors W ? ? Notes: AB 1880: 133.0 @ 295. 2 measurements. AC 1880: 141.7 @ 336. 2 measurements. Star A is a long-period spectroscopic binary (12.9 years). It is also an infra-red source and its diameter has been measured as 0.00135". About 1o NNE is the gamma ray source GemingA (at 0634+1747, not visible in a small scope). It moves along at 1.5" in 8 years, making it the nearest neutron star to earth (estimated at 300 light years). - 41 - Zone 136 Neutron stars are the remnants of supernovae whose left-over degenerate cores exceed Chandrasekhar's Limit of 1.40 solar masses (but less than 3 solar masses, or they would become black holes). The Chandrasekhar Limit is not fixed at 1.40, but varies with star type and rotational velocity. Helium white dwarfs need to be 1.44 solar masses or more to become neutron stars; carbon white dwarfs (the normal variety) 1.40; and iron dwarfs (rare), 1.11. Also, if the dwarf rotates rapidly, the threshhold can rise. The triggering density seems to be the key stimulus, and that value is 1017 kg per cubic meter(!!). Any mass over the limit means that gravitational forces collapse the star to the point where the protons and electrons merge to form neutrons. Neutron stars are small (10-15 km diameters) and spin hundreds of times per second. If they have strong magnetic fields that have their poles pointing more or less at earth, they are detected as pulsars. Their structure is thought to consits of an atmosphere only a few centimeters thick overlaying a 1 km thick crust, under which lies a superfluid neutron "soup", down to a solid crystal core. Apparently, the crust undergoes plate tectonic forces and shifts or cracks from time to time, because "hiccups" in the pulse frequency of pulsars have been attributed to "star quakes". From James Kaler's Star Notes: Alhena is class A, denoting one with strong hydrogen absorptions and a temperature near 9,000 Kelvin (this one 9,200). It is a slightly overluminous and evolved "subgiant" star, one whose core hydrogen fusion has shut down in the first stage of stellar death. The temperature and luminosity, the strength of the star's gravity as revealed by its spectrum, and direct measurements of angular diameter lead to a diameter about five times that of the Sun, the star having more-or-less solar chemical abundances. Other than the possibility of a strong magnetic field, the star seems rather ordinary, if bright. Its fame (beyond its apparent brightness) rests on other factors. It is a "spectroscopic" double, one whose duplicity was first known because of the shifting of the star's line-of-sight velocity caused by a companion that orbits with a 12.6 year period. Alhena is also the brightest star ever observed to be occulted (crossed over, eclipsed) by an asteroid, the minor planet 381 Myrrha in 1991, the crossing time leading to an asteroidal diameter of 140 kilometers. The occultation revealed the fainter companion to be almost 200 times fainter than Alhena proper and to be a main sequence (hydrogen-fusing) G star like the Sun. From the accumulated observations, the companion, of about one solar mass, orbits the 2.8 solar mass primary (Alhena) at an average separation of about 8.5 astronomical units (Earth-Sun distances), about the size of the orbit of Saturn. The orbit, however, is very elliptical, taking the little one from about as close as Earth is to the Sun to what would be close to the orbit of Uranus. Planets would seem quite impossible! - 42 - Zone 136 Observations: C8 at 104x. Rich field. Webb wrote of it, "With low power, minute stars radiate from it every way. Pretty field." Scale model (in which the Sun is the size of a baseball): Diameter: A = 11.7 inches. Separation: AB = 22.2 miles; AC = 23.5 miles. Distance (LY): 105 Total luminosity (Suns): 160 STF 947 Rating: 5 E HD 47630; SAO 95980 Position: 0640+1925 A B Magnitude 8.77 10.76 Separation PA — — 18.6 + 175 - Year — 1991 Notes: 1830: 18.5 @ 177. 4 measurements. Observations: C8 at 104x. Rich field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 7.39 inches. Separation: AB = 37.7 miles. Distance (LY): 1,300 Total luminosity (Suns): 48 - 43 - Spectra A2 Colors W ? Zone 136 Moderate STF 899 Rating: 2 M ADS 4991; HD 44496; SAO 95602 Position: 0623+1734 A B Magnitude 7.43 8.30 Separation PA — — 2.1 19 - Year — 1997 Spectra A0 V Colors W R Notes: 1831: 2.4 @ 20. 66 measurements. Observations: C8 at 280x. Extremely difficult; use a diffraction mask. Webb saw them as Y and W. Scale model (in which the Sun is the size of a baseball): Diameter: A = 9.00 inches. Separation: AB = 2.85 miles. Distance (LY): 870 Total luminosity (Suns): 129 OS 141 Rating: 3 M ADS 5121; HD 45757; SAO 95748 Position: 0630+1754 A B Magnitude 7.69 9.78 Separation PA — — 2.2 = 146 + Year — 1991 Spectra A0 Notes: 1843: 2.2 @ 139. 18 measurements. Observations: C11 at 339x. This is the southernmost star of a remarkable "X" asterism! - 44 - Colors W W Zone 136 OS 140 Rating: 5 M ADS 5062; HD 45180; SAO 95684 Position: 0627+1531 A B C Magnitude 6.88 9.40 Separation — 2.7 + 49.7 PA — 119 34 Year — 1982 1933 Spectra B9 IV Colors W ? No Notes: AB 1843: 2.4 @ 125. 24 measurements. AC 1 measurement. May be the same as Chevalier 82. Observations: C8 at 280x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 12.0 inches. Separation: AB = 2.69 miles; AC = 49.6 miles. Distance (LY): 640 Total luminosity (Suns): 66 Barton 1208 Rating: 5 M HD 47681; SAO 95985 Position: 0641+1738 A B Magnitude 7.73 9.70 Separation PA — — 5.3 174 - Notes: 1896: 5.7 @ 175. 7 measurements. Observations: C8 at 206x. - 45 - Year — 1993 Spectra F8 Colors W ? Zone 136 Scale model (in which the Sun is the size of a baseball): Diameter: A = 14.7 inches. Separation: AB = 1.97 miles. Distance (LY): 239 Total luminosity (Suns): 3.2 Difficult Hough 233 Rating: 5 D ADS 4997; HD 44584; SAO 95604 Position: 0623+1631 A B Magnitude 8.01 10.39 Separation PA — — 2.2 + 37 = Year — 1991 Spectra B9 III Colors pB ? Notes: 1887: 1.7 @ 37. 13 measurements. Observations: C8 at 697x. Use a diffraction mask. Scale model (in which the Sun is the size of a baseball): Diameter: A = 18.6 inches. Separation: AB = 3.70 miles. Distance (LY): 1,080 Total luminosity (Suns): 105 OS 145 Rating: 5 D ADS 5168; HD 46148; SAO 95800 Position: 0632+1542 A B Magnitude 7.18 10.00 Separation PA — — 1.5 338 - Notes: 1843: 2.0 @ 348. 17 measurements. - 46 - Year — 1991 Spectra F5 Colors W W Zone 136 Observations: C8 at 280x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 12.4 inches. Separation: AB = 1.13 miles. Distance (LY): 485 Total luminosity (Suns): 27 Deep Sky Objects Easy Bochum 1 Rating: 5 E Position: 0626+1946 Type: Oc Magnitude: 7.9 Notes: The brightest star is 8.42m. Observations: C8 at 206x. Four 10-12m stars in a narrow triangle. Distance (LY): 9,130 Total luminosity (Suns): 4,500 - 47 - Zone 136 Difficult PK 194+2.1 Other Names: Jones 900 Rating: 3 D Position: 0626+1747 Type: Pn Magnitude: 12.0 Dimensions: 10" Observations: C8 at 104x. Faint but well-defined. Use a nebular filter. Three 9m stars form an EW line; this nebula lies near its midpoint, and about 3 min E of the middle star. No details seen at any power, but the center is very bright. Distance (LY): 7,500 Luminosity (suns): 70 Zone 136, Map 6 Double Stars Easy Pourteau 2094 Position: 0653+2351 A B Magnitude 10.84 12.00 Rating: 4 E Separation PA — — 11.5 345 Notes: 1 measurement. Observations: C11 at 115x. - 48 - Year — 1892 Spectra Colors W ? Zone 136 Doolittle 37 Rating: 4 E HD 265675 Position: 0654+2333 A B Magnitude 9.76 11.13 Separation PA — — 19.4 240 + Year — 1910 Spectra F0 Colors W rO Notes: 1892: 20.1 @ 239. 3 measurements. The stars have different proper motions. Observations: C11 at 115x. It is part of a lopsided "kite" asterism. Pourteau 2133 Position: 0655+2335 A B Magnitude 11.66 12.00 Rating: 4 E Separation PA — — 14.5 + 243 - Year — 1907 Spectra Colors W W Notes: 1892: 14.1 @ 244. 2 measurements. Observations: C11 at 115x. Pourteau 2032 Rating: 5 E HD 264090 Position: 0649+2359 A B Magnitude 9.67 11.90 Separation PA — — 9.4 197 Notes: 1 measurement. - 49 - Year — 1925 Spectra Colors W ? Zone 136 Observations: C8 at 104x. Sparse field. Pourteau 2072 Position: 0652+2315 A B Magnitude 10.02 11.30 Rating: 5 E Separation PA — — 10.3 + 41 + Year — 1907 Spectra Colors B ? Notes: 1892: 10.0 @ 38. 2 measurements. Observations: C11 at 115x. A 513 Rating: 5 E ADS 5535; HD 50106; SAO 78823 Position: 0653+2458 A B C Magnitude 9.02 13.82 9.90 Separation — 60.2 141.3 PA — 108 107 Year — 1910 1910 Spectra G5 Colors yW ? ? Notes: AB and AC, 1 measurement. Observations: C8 at 104x. C was very, very far away! Glad I had a catalog to confirm it was a member, otherwise I would have taken it for a field star. E was not seen. Scale model (in which the Sun is the size of a baseball): Diameter: A = 20.6 inches. Separation: AB = 44.2 miles; AC = 104 miles. Distance (LY): 470 Total luminosity (Suns): 7.188 - 50 - Zone 136 Pourteau 2117 Position: 0654+2425 A B Magnitude 10.72 11.28 Rating: 5 E Separation PA — — 15.0 + 21 = Year — 1907 Spectra Colors W ? Notes: 1892: 14.9 @ 21. 2 measurements. Observations: C11 at 115x. It is framed by a 10m triangle. h402 Position: 0655+2322 A B Magnitude 10.98 12.05 Rating: 5 E Separation PA — — 18.9 195 Year — 1910 Spectra Colors yW W? Notes: 1 measurement. Observations: C11 at 115x. Nice field. OS 161 rej Rating: 5 E ADS 5564; HD 50634; SAO 78858 Position: 0655+2134 A B Magnitude 6.98 11.43 Separation PA — — 20.3 + 171 - Notes: 1843: 18.0 @ 177. 9 measurements. Observations: C8 at 83x. Rich field. - 51 - Year — 1931 Spectra B9 Colors W ? Zone 136 Scale model (in which the Sun is the size of a baseball): Diameter: A = 4.69 inches. Separation: AB = 42.8 miles. Distance (LY): 1,350 Total luminosity (Suns): 205 Moderate STF 991 Rating: 3 M ADS 5608; HD 51127; SAO 78898 Position: 0657+2457 A B C D CD Magnitude 7.62 9.01 10.60 11.10 Separation — 3.8 = 134.4 14.1 + PA — 165 202 Year — 1991 1907 1+ 1907 Spectra A0 Colors Y V ? No Notes: AB 1830: 3.8 @ 172. 24 measurements. AC 1 measurement. CD 1907: 13.2 @ 359. 2 measurements. Observations: C8 at 280x. Webb saw them as W and B. Scale model (in which the Sun is the size of a baseball): Diameter: A = 5.98 inches. Separation: AB = 3.26 miles; AC = 115 miles; CD = 12.1 miles. Distance (LY): 550 Total luminosity (Suns): 37 Hough 27 Rating: 4 M ADS 8818; SAO 181460 Position: 0656+2005 A B C Magnitude 7.76 9.26 9.71 Separation — 3.3 + 25.0 -! PA — 126 = 153 - - 52 - Year — 1933 1991 Spectra A2 III Colors W W ? Zone 136 Notes: AB 1882: 3.0 @ 126. 12 measurements. AC 1894: 34.5 @ 165. 7 measurements. Observations: C8 at 280x. C11 at 193x. C is very difficult. Scale model (in which the Sun is the size of a baseball): Diameter: A = 20.1 inches. Separation: AB = 2.72 miles; AC = 20.7 miles. Distance (LY): 530 Total luminosity (Suns): 22 Difficult Couteau 472 Position: 0646+2233 A B Magnitude 10.30 10.30 Rating: 4 D Separation PA — — 1.6 + 86 = Year — 1997 Spectra Colors W W Notes: 1970: 1.5 @ 86. 2 measurements. Observations: C11 at 634x. OS 160 Rating: 5 D ADS 5553; HD 50482; SAO 78852 Position: 0654+2110 A B Magnitude 6.51 9.80 Separation PA — — 1.3 + 188 + Notes: 1843: 1.0 @ 155. 29 measurements. - 53 - Year — 1991 Spectra K1 III Colors Y W Zone 136 Observations: C11 at 634x. Scale model (in which the Sun is the size of a baseball): Diameter: A = 2.40 inches. Separation: AB = 4,805 feet. Distance (LY): 452 Total luminosity (Suns): 41.7 Zone 136, Map 7 Double Stars Easy STF 976 Rating: 4 E HD 49885; SAO 96194 Position: 0652+1840 A B C Magnitude 9.10 9.90 Separation — 35.7 = 27.1 - PA — 118 = 321 + Year — 1980 1905 Spectra A2 Colors W O No Notes: AB 1829: 35.7 @ 118. 11 measurements. The stars share common proper motion. AC 1895: 27.4 @ 320. 3 measurements. Observations: C8 at 104x. Rich field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 7.53 inches. Separation: AB = 29.0 miles; AC = 22.0 miles. Distance (LY): 520 Total luminosity (Suns): 7 - 54 - Zone 136 Bur 899 Rating: 4 E ADS 5645; HD 51691; SAO 96344 Position: 0659+1844 A B C D Magnitude 8.57 9.20 10.85 9.21 Separation — 0.7 = 24.2 + 41.4 + PA — 266 = 176 + 47 - Year — 1980 1987 1991 Spectra K2 III Colors Y No W W Notes: AB 1879: 0.7 @ 266. 25 measurements. AC 1879: 24.1 @ 174. 12 measurements. AD 1879: 40.5 @ 48. 21 measurements. Observations: C8 at 104x. A 9.2m star is about 1 minNE. Faint, moderate field. Scale model (in which the Sun is the size of a baseball): Diameter: A = 49.5 inches. Separation: AB = 686 feet; AC = 4.56 miles; AD = 7.81 miles. Distance (LY): 121 Total luminosity (Suns): 0.466 Deep Sky Objects Moderate NGC 2304 Other Names: Melotte 55; Collinder 120; Raab 42; H VI 2 Astronomical League Program: Herschel 400 Club Rating: 5 M Position: 0655+1801 Type: Oc Dimensions: 4' Class: II 1p Cluster population: 30 - 55 - Magnitude: 10.0 Zone 136 Observations: C8 at 83x. It is dominated by an 11m trapezoid; use averted vision. The major axis runs SW-NE. Run the power on up and resolve more and more of this delicate little group. Distance (LY): 13,000 Total luminosity (Suns): 1,300 - 56 - Zone 136 Zone 136 Mini-Catalog Double Stars Designation 20 Gem Position 0632+1746 Rating 1E Map Component A B C BC A B A B C BC A B C A B C D E BD BE A B A B A B A B C A B A B A B C D E A B C A B A B C 5 STF 860 0611+2453 2E 1 Mu Gem 0623+2231 2E 4 15 Gem 0628+2047 2E 4 South 524 0634+2207 2E 4 Hipparcos 824 0604+1816 3E 2 OS 134 0609+2426 3E 1 H VI 114 0610+1554 3E 3 12 Gem 0619+2316 3E 1 A. G. 109 0620+2128 3E 4 OSS 75 0621+1803 3E 5 South 513 0621+2108 3E 4 A. G. 112 0628+2432 3E 4 Weisse 12 0631+2143 3E 4 OS 143 0631+1656 3E 5 - 57 - Mag 6.26 6.91 14.10 8.39 9.85 2.87 10.49 10.70 6.60 8.59 12.40 7.18 7.42 10.00 13.00 13.00 7.80 8.97 7.42 8.99 7.40 10.30 6.95 10.28 10.30 9.44 9.67 7.58 8.88 7.34 9.11 10.92 7.62 10.50 9.83 9.88 11.10 8.63 8.70 6.30 9.40 11.41 Separation — 19.9 + PA — 211 + 47.4 — 5.9 + — 121.7 72.7 0.6 — 25.9 77.7 — 53.5 104.4 - 136 — 357 — 141 = 72.7 265 — 203 77.7 — 244 = 104.4 - 39.1 51.8 — 2.3 = — 30.9 — 54.8 + — 61 63 — 2.3 + — 47.1 — 58.2 46.6 +! 265.1 84.0 — 2.8 = 35 — 8.5 = — 8.0 + 44.8 + 294 267 — 148 = — 189 = — 106 — 60 63 — 18 — 129 + — 259 + 46.6 +! 265.1 286 +! — 209 + 35 — 66 + — 102 = 44.8 + Zone 136 Designation Position Rating Map Giacobini 20 0637+2335 3E 4 Doolittle 36 0638+2311 3E 4 A. G. 119 0645+2327 3E 4 A. G. 103 0601+2014 4E 2 Scardia 37 0610+2032 4E 2 Scardia 38 0611+1913 4E 2 68 Ori 0612+1947 4E 2 OSS 70 0614+2359 4E 1 A 2044 0615+1649 4E 3 A 2447 0616+1614 4E 3 8 Gem 0616+2358 4E 1 Fox 9 0618+2151 4E 1 Hussey 452 0620+2218 4E 1 Pourteau 1245 0621+2431 4E 4 STF 913 0628+1542 4E 5 OS 519 0631+1543 4E 5 Pourteau 1883 0641+2336 4E 4 Pourteau 1891 0642+2436 4E 4 Fox 149 0643+2320 4E 4 Pourteau 1976 0645+2318 4E 4 STF 976 0652+1840 4E 7 Pourteau 2094 0653+2351 4E 6 Doolittle 37 0654+2333 4E 6 Pourteau 2133 0655+2335 4E 6 Component A B A B A B A B A B A B C A B A B A B A B A B A B A B A B A B A B A B C A B A B A B A B A B A B A B - 58 - Mag 10.61 12.26 9.17 9.42 8.94 9.13 9.11 10.68 10.29 10.33 8.68 11.36 11.11 5.74 9.36 7.53 7.88 8.57 9.65 8.97 11.05 7.00 7.50 10.51 10.70 9.47 10.82 8.65 10.86 8.40 10.20 8.25 10.58 9.47 10.38 11.75 10.28 10.40 9.55 10.50 9.93 10.70 9.10 9.90 10.84 12.00 9.76 11.13 11.66 12.00 Separation — 8.0 — 28.9 +! — 1.5 = — 15.2 + — 24.8 — 42.7 + 73.1 + — 89.8 + — 114.3 — 63.9 — 34.3 + — 117 — 5.1 — 2.7 + — 14.1 — 31.2 — 8.2 + — 18.1 BC 1.5— 6.5 + — 6.6 + — 8.2 + — 35.7 = 27.1 — 11.5 — 19.4 — 14.5 + PA — 227 — 136 -! — 84 + — 103 + — 95 +? — 286 73.1 + — 205 — 178 = — 183 = — 310 = — 178 — 178 = — 343 + — 24 — 49 + — 79 + — 25 BC 184= — 5— 42 — 293 — 118 = 27.1 — 345 — 240 + — 243 - Zone 136 Designation Position Rating Map Bur 899 0659+1844 4E 7 H IV 48 0601+2320 5E 1 Pourteau 849 0602+2440 5E 1 Pourteau 856 0603+2447 5E 1 Scardia 40 0612+1926 5E 2 Scardia 46 0618+2013 5E 2 h2306 0618+2016 5E 2 Pourteau 1244 0621+2345 5E 4 Osborn 3 0623+2244 5E 4 h390 0628+2418 5E 4 h2320 0633+2053 5E 4 Gamma Gem 0638+1624 5E 5 Hough 625 0638+2427 5E 4 STF 947 0640+1925 5E 5 Pourteau 1912 Jonckheere 1968 0642+2441 5E 4 0642+2436 5E 4 Pourteau 2032 0649+2359 5E 6 Pourteau 2072 0652+2315 5E 6 A 513 0653+2458 5E 6 Pourteau 2117 0654+2425 5E 6 OS 161 rej 0655+2134 5E 6 h402 0655+2322 5E 6 STF 899 0623+1734 2M 5 A. G. 107 0613+2426 3M 1 Component A B C D A B A B C A B A B A B A B A B A B A B A B A B C A B C A B A B A B A B A B A B C A B A B A B A B A B - 59 - Mag 8.57 9.20 10.85 9.21 8.23 9.67 9.98 11.90 13.20 11.06 12.68 9.55 11.63 10.59 10.85 10.53 10.84 10.97 11.14 9.86 11.00 10.85 11.51 8.30 10.71 1.93 11.20 10.90 6.75 11.90 9.30 8.77 10.76 10.49 11.58 10.28 10.40 9.67 11.90 10.02 11.30 9.02 13.82 9.90 10.72 11.28 6.98 11.43 10.98 12.05 7.43 8.30 9.56 9.82 Separation — 0.7 = 24.2 + 41.4 + — 31.4 + — 21.7 + 8.6 + — 15.6 + — 32.3 — 28.4 + — 4.3 + — 15.7 — 7.9 — 14.0 = — 8.9 — 135.5 + 143.5 + — 13.5 + 47.4 — 18.6 + — 15.7 — 6.0 — 9.4 — 10.3 + — 60.2 141.3 — 15.0 + — 20.3 + — 18.9 — 2.1 — 1.4 = PA — 266 = 24.2 + 41.4 + — 259 = — 0+ 8.6 + — 241 -!! — 198 — 200 + — 32 + — 312 — 5 — 47 = — 325 + — 295 = 143.5 + — 193 47.4 — 175 — 202 -? — 5— 197 — 41 + — 108 141.3 — 21 = — 171 — 195 — 19 — 179 - Zone 136 Designation Position Rating Map OS 141 0630+1754 3M 5 STF 942 0638+2339 3M 4 STF 991 0657+2457 3M 6 Couteau 85 0609+2424 4M 1 71 Ori 0615+1909 4M 2 H V 23 0617+1551 4M 3 Nu Gem 0629+2013 4M 4 Hough 27 0656+2005 4M 6 Kustner 89 0603+2450 5M 1 1 Gem 0604+2316 5M 1 Jonckheere 341 0617+2318 5M 1 STF 886 0619+2317 5M 1 OS 140 0627+1531 5M 5 Barton 1208 0641+1738 5M 5 STF 867 0612+1723 4D 3 Couteau 472 0646+2233 4D 6 OS 125 0600+2228 5D 1 Eta Gem 0615+2230 5D 1 Hough 233 0623+1631 5D 5 Hough 514 0630+2233 5D 4 OS 145 0632+1542 5D 5 Component A B A B A B C D CD A B A B C D A B A B A B C A B C A B A B C A B A B C A B A B C A B A B A B A B A B C A B - 60 - Mag 7.69 9.78 10.07 10.10 7.62 9.01 10.60 11.10 9.14 10.05 5.20 11.20 10.50 10.00 7.30 10.60 4.13 12.85 7.76 9.26 9.71 10.39 12.40 12.20 4.16 13.00 10.97 11.00 11.79 9.86 12.40 6.88 9.40 7.73 9.70 7.53 8.88 10.30 10.30 7.75 8.89 3.31 8.80 8.01 10.39 6.98 12.50 12.80 7.18 10.00 Separation — 2.2 = — 3.4 + — 3.8 = 134.4 PA — 146 + — 246 + — 165 134.4 14.1 + — 1.9 + — 25.4 +!! 76.1 85.8 — 44.9 + — 15.3 — 3.3 + 25.0 -! — 15.0 216.3 — 101.0 + — 1.7 + 21.6 — 5.8 — 2.7 + 49.7 — 5.3 — 2.2 = 74.5 — 1.6 + — 1.4 + — 1.6 + — 2.2 + — 19.7 + 39 — 1.5 - 1+ — 334 +? — 202 76.1 85.8 — 230 + — 263 — 126 = 25.0 -! — 271+ 216.3 — 25 — 144 21.6 — 189 + — 119 49.7 — 174 — 159 + 74.5 — 86 = — 0— 259 — 37 = — 123 39 — 338 - Zone 136 Designation Position Rating Map OS 155 0646+2440 5D 4 OS 160 0654+2110 5D 6 Component A B A B Mag 6.95 10.89 6.51 9.80 Separation — 15.5 + — 1.3 + PA — 261 + — 188 + Deep Sky Objects Object NGC 2168 Collinder 89 Bochum 1 PK 189+ 7.1 NGC 2129 NGC 2175S IC 2156-7 NGC 2174 IC 443 NGC 2304 PK 194+2.1 NGC 2158 NGC 2175 Position 0609+2420 0618+2338 0626+1946 0637+2401 0601+2318 0611+2036 0605+2409 0610+2030 0617+2247 0655+1801 0626+1747 0608+2406 0609+2019 Rating 2E 5E 5E 3M 4M 4M 5M 5M 5M 5M 3D 5D 5D Map 1 1 5 4 1 2 1 2 1 7 5 1 2 Type Oc (III 3r) Oc (IV 2pn) Oc Pn (2) Oc (I 3m) Oc (n) Oc (III 2p) Gn (E) SNR (E) Oc (II 1p) Pn Oc (II 3r) Oc (III 3rn) - 61 - Specifications Surface Mag Br 5.1 5.7 7.9 13.0 6.7 6.8 8.4 7.4 9.0 10.0 12.0 8.6 6.8 Population 200 15 50 20 20 30 973 60
