Zone 266, Master Map
Normal View
Octans
ο
-24°00'
Zone Master, Normal View, 10 deg FOV
ο
c
υ
ρ
Libra
Lupus
g
τ
-32°00'
M62
d
ξ1
ξ2
ε
χ
17h 20m
17h 04m 16h 56m 16h 48m 16h 40m 16h 32m
e
θ
η
16h 16m
16h 00m
-38°00'
µ2
µ1
h
ψ1
-36°00'
ψ2
Scorpius
-30°00'
τ
-34°00'
f
-28°00'
π
α AntaresM4
M19
-26°00'
σ
15h 44m 15h 36m 15h 28m
Zone 266, Map 1
Normal Image
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Bur 38
22 Sco
Sigma Sco
NGC 6144
Alpha Sco
Antares
M4
NGC 6121
-27°00'
α
Pi Scoπ
-26°00'
σ
Stone 32
Bur 40
h4859
-28°00'
IC 4591
Glasenapp 5
Glasenapp 4
See 260
-29°00'
12 Sco
H N 39
h4826
Bos 1319
16h 30m
16h 25m
16h 20m
Lupus
16h 15m
16h 10m
16h 05m
16h 00m
Zone 266, Map 1
Mirror Image
Bur 38
IC 4605
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 6144
Pi Sco
See 255
NGC 6121 M4
Stone 32
-27°00'
Alpha Sco
Antaresα
-28°00'
Bur 40
Glasenapp 5
Glasenapp 4
IC 4591
See 260
12 Sco
-29°00'
π
-26°00'
Sigma Scoσ
H N 39
h4826
Bos 1319
Lupus
16h 00m
16h 05m
16h 10m
16h 15m
16h 20m
16h 25m
16h 30m
Zone 266, Map 2
Normal Image
Bos 1319
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Lupus
-32°00'
-31°00'
55G
Perth Obs 128
h4848
-33°00'
Brisbane 11
h4843
ξ1
ξ2
h4840
16h 30m
16h 25m
16h 20m
16h 15m
16h 10m
16h 05m
16h 00m
-34°00'
h4832
Zone 266, Map 2
Mirror Image
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Bos 1319
Lupus
-32°00'
-31°00'
55G
h4821
Perth Obs 128
-33°00'
Brisbane 11
h4848
h4843
-34°00'
h4832
Xi Lup
Cordoba 189
h4840
16h 00m
16h 05m
16h 10m
16h 15m
16h 20m
16h 25m
16h 30m
Zone 266, Map 3
Normal Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
See 256
Howe 81
-37°00'
Theta Lup
-38°00'
θ
Cordoba 193
η
Eta Lup
-39°00'
NGC 6139
Dunlop 199
Innes 91
16h 30m
16h 25m
16h 20m
16h 15m
16h 10m
-36°00'
Terzian 3
16h 05m
16h 00m
Zone 266, Map 3
Mirror Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-36°00'
Terzian 3
See 256
Howe 81
-37°00'
Theta Lup
-38°00'
θ
Cordoba 193
Eta Lup
NGC 6139
Dunlop 199
Innes 91
16h 00m
16h 05m
16h 10m
16h 15m
16h 20m
16h 25m
16h 30m
-39°00'
η
Zone 266, Map 4
Normal Image
Scorpius
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
IC 4605
-26°00'
h1292
-27°00'
α
-28°00'
h4902
h4878
τ
h4859
-29°00'
h4887
h4895
Hough 554
Octans
M62
17h 00m
16h 55m
16h 50m
16h 45m
16h 40m
16h 35m
16h 30m
Zone 266, Map 4
Mirror Image
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Scorpius
22 Sco
-26°00'
h1292
-27°00'
α
-28°00'
h4902
h4878
τ
h4859
-29°00'
h4887
h4895
Octans
16h 30m
16h 35m
16h 40m
16h 45m
16h 50m
16h 55m
17h 00m
Zone 266, Map 5
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h4903
-31°00'
M62
-30°00'
Octans
-33°00'
-32°00'
Bos 1328
ε
17h 00m
16h 55m
-34°00'
Innes 95
Epsilon Sco
16h 50m
Howe 84
16h 45m
16h 40m
16h 35m
16h 30m
Zone 266, Map 5
Mirror Image
Octans
-31°00'
h4903
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-33°00'
-32°00'
Bos 1328
Howe 84
16h 30m
16h 35m
16h 40m
16h 45m
ε
-34°00'
Innes 95
Epsilon Sco
16h 50m
16h 55m
17h 00m
Zone 266, Map 6
Normal Image
-36°00'
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Russell 286
-37°00'
Dunlop 209
h4870
Jessup 700
-38°00'
h4889
µ2µ1
Mu 1 Sco
-39°00'
See 313
NGC 6242
17h 00m
16h 55m
16h 50m
16h 45m
16h 40m
16h 35m
16h 30m
Zone 266, Map 6
Mirror Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Dunlop 209
Russell 286
-37°00'
-36°00'
Terzian 3
h4870
µ2
µ1
Mu 1 Sco
Jessup 700
-38°00'
h4889
See 313
-39°00'
NGC 6139
NGC 6242
16h 30m
16h 35m
16h 40m
16h 45m
16h 50m
16h 55m
17h 00m
Zone 266
2 Reference Stars, 43 Double Stars, 2 Bright Nebulae,
1 Open Cluster, 3 Globular Clusters
Flamsteed
Cordoba 193 ........................................ 22
h4826 ..................................................... 5
h4832 ................................................... 18
h4840 ................................................... 16
h4843 ................................................... 18
h4848 ................................................... 16
h4859 ................................................... 25
h4870 ................................................... 32
h4878 ................................................... 26
h4887 ................................................... 24
h4889 ................................................... 30
h4895 ................................................... 26
h4902 ................................................... 25
h4903 ................................................... 28
Howe 81............................................... 20
Howe 84............................................... 28
D
I
Dunlop 199 .......................................... 19
Dunlop 209 .......................................... 30
IC 4591 ................................................ 13
IC 4605 ................................................ 13
Innes 91................................................ 21
Innes 95................................................ 29
12 Sco .................................................... 6
55G ...................................................... 15
A
Alpha Sco .............................................. 3
B
Bos 1319 ................................................ 6
Bos 1328 .............................................. 27
Brisbane 11 .......................................... 15
Bur 38 .................................................. 11
Bur 40 .................................................. 10
C
E
Epsilon Sco .......................................... 27
Eta Lup ................................................ 19
J
G
Jessup 700 ............................................ 31
Glasenapp 4 ......................................... 10
Glasenapp 5 ........................................... 9
M
H
N
H N 39 ................................................... 5
h1292 ................................................... 24
NGC 6121 ............................................ 12
NGC 6139 ............................................ 23
Mu 1 Sco.............................................. 29
-1-
Zone 266
S
NGC 6144............................................ 14
NGC 6242............................................ 33
See 255................................................... 8
See 256................................................. 21
See 260................................................... 9
See 313................................................. 33
Sigma Sco .............................................. 7
Stone 32 ............................................... 11
P
Perth Obs 128 ...................................... 17
R
Russell 286 .......................................... 31
T
Theta Lup............................................. 22
-2-
Zone 266
Zone 266, Map 1
Double Stars
Easy
Alpha Sco
Rating: 5 D
21 Sco; Antares, "the rival of Mars", or anti-Mars; Grant 1; ADS 10074; HD 148478;
SAO 184415
Position: 1629-2626
A
B
Magnitude
1.06
5.40
Separation PA
—
—
2.8 +
277 +
Year
—
1996
Spectra
M1 II
B4
Colors
R
B
Notes:
1847: 2.6 @ 273. Over 100 measurements. According to Baize (1978), the orbit
takes 878 years.
Antares ("rival of Mars") has a diameter of 6.5 AU and the mass of 15 Suns. Antares
is so large that if it was placed where the sun is, Mars would orbit halfway between the
core and surface! It has an oval shape (deduced by lunar occultations, with a diameter
of 0.041"), and is shrouded in a diffuse nebula (made of solid particles, not gas) some 5
light years in diameter. It is also an infra-red source.
The "tiny" companion is 50 times as luminous as the Sun. It was first glimpsed in
1819 by Burg during a lunar occultation as it reappeared five seconds before Antares. It
is, for some reason, under-luminous for its spectral type. Its spectral lines suggest very
rapid rotation with a turbulent cloud surrounding it. It lies about 500 AU (6 times Pluto’s
orbit) from Antares. The orbital period, therefore, is something like 853 years, and
viewed nearly edge on. Closest approach should occur in 2115 AD, when even the
Hubble Space Telescope would have difficulty resolving them.
Antares is normally occulted in "seasons", often being eclipsed many months in a
row. (Between 1967 and 1972, it was occulted on 64 consecutive months!)
Antares is the brightest member of the Scorpio-Centaurus Association. This large
group of early type stars is some 90o in diameter, and includes most of the brighter stars
of Scorpius, Lupus, Crux, and Centaurus. All the members of this group are moving
toward the southwest to a focal point in Columba. Some 100 stars are known to be
members, including Beta Cru, Sigma Sco, Epsilon Cen, Alpha Lup, Delta Sco, and the
shell star 48 Lib. The Association appears to be about 20 million years old.
In mythology, the scorpion’s sting killed the giant hunter, Orion. To keep these
mortal enemies apart forever, the gods placed them on opposite sides of the sky.
-3-
Zone 266
From James Kaler's Star Notes:
Its name, Antares, or "Ant-Ares," means "like Mars," "Ares" being the Greek name
for the god of war. Because it is cool, only about 3,400 degrees Kelvin at its surface, it
radiates a considerable amount of its light in the invisible infrared. When that is taken
into account, the star becomes almost 40,000 times brighter than the Sun.
A low temperature coupled with high luminosity tells us that the star must be huge, so
big that astronomers can actually detect and measure the size of its apparent disk. If
placed at the Sun, the star, aptly called a supergiant, would extend outward for over 4
Astronomical Units (the distance between the Earth and Sun) and therefore 4/5 the way to
the planet Jupiter.
The star is slowly evaporating under a fierce wind that blows from its surface and that
has encased it in a small gas cloud or nebula. Ordinarily, such a nebula (common among
such supergiants) would not be visible to the eye, but in the case of Antares, the cloud is
illuminated by the light of a hot companion star that at fifth magnitude hides closely
within Antares' bright glare.
Antares probably does not have much time left. It is massive enough someday to
develop an iron core and eventually to explode as a brilliant supernova long before it
would ever have a chance to evaporate completely. The event may be a million years off,
an astronomical blink of an eye; or it may occur tonight, so keep a watch on one of the
great stars of the nighttime sky.
Observations:
C8 at 206x. I found it easiest to see at evening twilight and with a diffraction mask.
On another night, using a mask and 280x, I was able to spot the companion between
spokes of the mask. It normally sits on the second diffraction ring.
I have also viewed this pair using an O-III filter, which greatly dminishes the light
from Antares and lets the companion shine through without much damage.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 174 feet; B = 1.92 inches.
Separation: AB = 2.62 miles.
Distance (LY): 600
Total luminosity (Suns): 12,000
-4-
Zone 266
h4826
Rating: 3 E
ADS 9900; HD 143535
Position: 1602-2943
A
B
Magnitude
9.81
10.06
Separation PA
—
—
4.9 +
249 -?
Year
—
1991
Spectra
A9 V
Colors
W
W
Notes:
1834: 2.0 @ 78. 10 measurements. Quadrant reversal?
Observations:
C11 at 98x.
H N 39
h4850; ADS 10035; HD 147722; SAO 184368
Rating: 3 E
Position: 1625-2942
A
B
Magnitude
5.40
6.60
Separation PA
—
—
4.6 +
357 +
Year
—
1992
Spectra
G0 V
G0
Colors
Y
Y
Notes:
1834: 4.0 @ 352. 57 measurements.
Observations:
C8 at 104x. W, bW. Others note pB, Y in one report, yW and pB in another.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.45 inches; B = 15.4 inches.
Separation: AB = 3,850 feet.
Distance (LY): 103
Total luminosity (Suns): 7.7
-5-
Zone 266
12 Sco
h4839; ADS 9953; HD 145483; SAO 184217
Rating: 4 E
Position: 1612-2825
A
B
Magnitude
5.90
7.90
Separation PA
—
—
4
75 -
Year
—
1975
Spectra
B9 V
Colors
Y
?
Notes:
This pair is a member of the Sco OB2 Association.
1834 (by John Herschel): 4.1 @ 78.
The stars share common proper motion.
Observations:
C8 at 104x.
Others note pB, ?.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.60 inches.
Separation: AB = 1.86 miles.
Distance (LY): 298
Total luminosity (Suns): 35.8
Bos 1319
Rating: 4 E
HD 147138; SAO 184334
Position: 1621-2958
A
B
C
Magnitude
9.91
10.40
11.40
Separation
—
8.0 +
1.1 -
PA
—
139 6+
Notes:
AB 1928: 7.9 @ 143. 4 measurements.
AC 1928: 1.2 @ 4. 3 measurements.
Observations:
C11 at 98x.
-6-
Year
—
1967
1966
Spectra
G5
Colors
Y
W
No
Zone 266
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 21.6 inches.
Separation: AB = 3,010 feet; AC = 370 feet.
Distance (LY): 46
Total luminosity (Suns): 0.034
Sigma Sco
Rating: 4 E
20 Sco; Al Niyat, "the outworks of the heart"; Sh 224; H IV 121; Morgan 4 (B);
ADS 10009; HD 147165; SAO 184336
Position: 1621-2535
A
B
a
Magnitude
2.89
8.42
5.16
Separation
—
20 0.3
PA
—
273 +
292
Year
—
1988
1976
Spectra
B1 III
B9 V
Colors
W
B
Notes:
AB 1783: 21.7 @ 270. 31 measurements.
Aa 1 measurement.
The primary is a Beta CMa spectroscopic binary with a 34.1 day period, and is also a
pulsating variable. It is also an infra-red source as well as an occultation double.
This system is part of the Sco OB2 Association.
From James Kaler's Star Notes:
The system is dominated by a brilliant double star (seen as one with eye) that is too
close to separate in any way other than with the spectrograph. The two hot components,
one a class O (O9) hydrogen- fusing dwarf, the other a class B (B2) giant, and are
separated by only about the distance of Venus from the Sun. Still close, but still
resolvable (only 0.4 seconds of arc away) lies another, what is probably a mid-class B
star two magnitudes fainter, and farther out yet is a telescopic (ninth magnitude)
companion of cooler class B (B9 or so). The distance, and consequently the luminosities,
of the stars are not well known.
Sigma is a member of a large group or association of hot stars called "Upper
Scorpius," whose average distance is 470 light years. One of the stars, probably the
cooler class B giant, is a subtle variable that changes brightness by around 10 percent
with multiple periods that range from a quarter of a day to years (in much the same way
as Mirzam, Beta Canis Majoris). Al Niyat (Sigma) is involved with a large mass of
interstellar gas, which it ionizes and makes to glow as a diffuse nebula easily visible on
photographs of the constellation. Rather unusual among bright naked eye stars, Sigma's
light is dimmed by interstellar dust by over a magnitude, which must be corrected for.
-7-
Zone 266
Absorption of starlight by the dust also "reddens" the star, making a naturally blue-white
star look a rather dulled yellow-white. Whatever the distance, the two stars are very
young (only a few million years old) and have large masses that lie between perhaps 12
and 20 solar masses each. To be a giant now, one that has already started its death
process, the class B star must once have been the more massive of the pair. Unless the
distance is still overestimated, each of the stars will eventually blow up as supernovae,
the B star first, the O star next. Much later, the other two more-distant companions will
die as massive white dwarfs like Sirius B.
Observations:
C8 at 83x. Some observers have reported W and B, or pY and W. Others note pB,
pR. Hartung noted Y and W. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.4 inches; B = 5.16 inches.
Separation: AB = 22.8 miles; Aa = 19.6 feet.
Distance (LY): 730
Total luminosity (Suns): 92,000
See 255
Rating: 5 E
ADS 9869; HD 143231; SAO 184011
Position: 1600-2610
A
B
C
Magnitude
8.70
14.00
10.60
Separation
—
12.1 16.7 +
PA
—
21 =
338 -
Notes:
AB 1897: 13.0 @ 21. 2 measurements.
AC 1897: 15.8 @ 342. 4 measurements.
Observations:
C8 at 104x.
-8-
Year
—
1899
1991
Spectra
F5
Colors
bW
No
?
Zone 266
See 260
Rating: 5 E
ADS 9884
Position: 1602-2822
A
B
Magnitude
8.81
10.09
Separation PA
—
—
6.1 21 -
Year
—
1991
Spectra
F6 V
Colors
W
W
Notes:
1897: 6.7 @ 22. 9 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.20 inches.
Separation: AB = 2.67 miles.
Distance (LY): 281
Total luminosity (Suns): 2
Glasenapp 5
Rating: 5 E
HD 144432; SAO 184124
Position: 1607-2743
A
B
Magnitude
8.19
10.70
Separation PA
—
—
35.4 +
221 -
Year
—
1988
Spectra
A9 V
Colors
Y
?
Notes:
1890: 29.3 @ 232. 5 measurements.
May be optical because Hipparcos gives different distances (820 and 27 light years).
Observations:
C8 at 104x.
-9-
Zone 266
Glasenapp 4
Rating: 5 E
HD 144985; SAO 184175
Position: 1610-2753
A
B
Magnitude
7.90
10.77
Separation PA
—
—
54.3 295 +
Year
—
1991
Spectra
K2 III
Colors
O
W
Notes:
AB 1890: 56.8 @ 288. 6 measurements.
Hipparcos/Tycho mission data show different distances for these stars (720 and 37
light years); they may be optical.
Observations:
C8 at 104x.
Bur 40
Rating: 5 E
ADS 9948; HD 145408
Position: 1612-2733
A
B
C
Magnitude
7.84
9.59
11.65
Separation
—
4.9 98.4
PA
—
351 96
Year
—
1991
1890
Notes:
AB 1876: 5.2 @ 352. 15 measurements.
AC 1 measurement.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.80 inches.
Separation: AB = 2.54 miles; AC = 51.1 miles.
Distance (LY): 333
Total luminosity (Suns): 6
- 10 -
Spectra
A5 III
Colors
W
W
W
Zone 266
Moderate
Stone 32
Rating: 4 M
ADS 10062; HD 148153; SAO 184393
Position: 1627-2711
A
B
Magnitude
8.20
11.44
Separation PA
—
—
11.6 +
349 +
Year
—
1991
Spectra
F5 V
Colors
W
?
Notes:
1880: 9.2 @ 344. 6 measurements.
Observations:
C8 at 104x. Use averted vision to see B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches.
Separation: AB = 7.53 miles.
Distance (LY): 416
Total luminosity (Suns): 29.45
Bur 38
Rating: 5 M
ADS 9899; HD 143715; SAO 184058
Position: 1603-2501
A
B
Magnitude
7.03
9.43
Separation PA
—
—
4.5 +
346 -
Year
—
1991
Notes:
1868: 4.2 @ 353. 20 measurements.
Observations:
C8 at 206x. It is framed by five or six 9m stars.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 6.88 miles.
- 11 -
Spectra
A0 V
Colors
W
?
Zone 266
Distance (LY): 980
Total luminosity (Suns): 132
Deep Sky Objects
Easy
NGC 6121
Rating: 2 E
Other Names: M4
Astronomical Leage Program: Messier Club, Urban Deep Sky Club, Messier Binocular
Club
Position: 1624-2632
Type: Gc
Dimensions: 20'
Class: 9
Magnitude: 7.4
Cluster population: 10,000
Notes:
De Cheseaux discovered it in 1746;
Lacaille noted it in 1745 or 1746, as did
Bode in 1779.
Messier added it to his list on May 8,
1764, but gave credit to Lacaille. Messier
acutally resolved it (the only globular he
could resolve).
The brightest stars are 10.8m and the
horizontal branch is 13.4m.
Absorption here is 1.9m.
This cluster harbors a millisecond pulsar
(1821-24), which rotates at 300 revolutions
per second, ten times as fast as the Crab
Nebula pulsar!
Observations:
C8 at 83x. Rich and resolved; it appears
NGC 6121 (M4)
to have a N-S bar. An 11m star lies just W
Globular cluster
of the center. A chain of 10-12m stars runs
Observed with C8 on 7/5/92
N-S.
Magnification: 62x
C11 at 98x. Class 9; large, it almost fills
the fov. Very rich and well-resolved. It
appears to have a bar of brighter stars that crosses it at a PA of 15 degrees.
- 12 -
Zone 266
14x70 Binos. In the awful haze and sky glow of Kansas City, I could get only the
central portion as a small, fuzzy disc.
Model (where the Sun is a baseball):
Its diameter would be 11,600 miles with stars 270 miles apart.
Distance (LY): 6,200
Luminosity (suns): 3,400
IC 4605
Position: 1630-2506
Type: Gn
Rating: 5 E
Class: R
Dimensions: 40'
Observations:
C8 at 65x. It surrounds 22 Sco and looks somewhat foggy. Not much detail.
If it were a winter object, you might mistake it for condensation on your eyepiece.
Model (where the Sun is a baseball):
Its diameter would be 660 miles.
Distance (LY): 550
Moderate
IC 4591
Position: 1612-2756
Type: Gn
Rating: 5 M
Dimensions: 23' x 15'
Notes:
It was discovered by E. E. Barnard in 1895.
Observations:
C8 at 104x. It is lit by 13 Sco.
Model (where the Sun is a baseball):
It would be 840 by 550 miles in size.
Distance (LY): 390
- 13 -
Zone 266
Difficult
NGC 6144
Other Names: H VI 10
Astronomical League Program: Herschel 400 Club
Rating: 4 D
Position: 1627-2602
Type: Gc
Dimensions: 3'
Class: 11
Magnitude: 10.0
Notes:
William Herschel discovered this cluster on May 22, 1784.
The brightest stars are 13.4m and the horizontal branch is 16.5m.
A lot of dust lies between us and this globular and dims it by 1.3m.
Observations:
C8 at 104x. Large but faint with no details visible. A 9m star is 6 min SSW. Barbara
Wilson's Herschel Club has named this globular "the Wimpy Globular". You can see
why!
C11 at 98x. Very faint and small, a 13 mag star is superimposed over the NW edge.
Two brighter stars lie to the S.
Model (where the Sun is a baseball):
Its diameter would be 9,300 miles.
Distance (LY): 33,000
Luminosity (suns): 8,800
- 14 -
Zone 266
Zone 266, Map 2
Double Stars
Easy
Brisbane 11
Rating: 2 E
SAO 207396
Position: 1609-3239
A
B
Magnitude
6.18
6.71
Separation PA
—
—
7.5 -! 85 -
Year
—
1993
Spectra
K1 III
F6 I
Colors
O
B
Notes:
John Herschel discovered this pair in 1837. 1837: 15.0 @ 86. 29 measurements.
The stars show common proper motion.
Observations:
C8 at 83x. Others note pY, pB. Hartung says & and &Y.
55G
Brisbane 12; HD 146836; SAO 207558
Rating: 2 E
Position: 1620-3054
A
B
Magnitude
5.53
7.29
Separation PA
—
—
23.2 319 -
Year
—
1994
Spectra
F5 IV
F8
Colors
Y!
B!
Notes:
1837: 27.5 @ 324. 23 measurements. Star A is a spectroscopic binary.
May be an optical pair as Hipparcos shows different distances (135 and 57 light
years).
Observations:
C8 at 83x. William Schaart (Killeen, TX; 6-inch Dob) agrees with my color
assessment, and calls it a "fainter Albiero."
- 15 -
Zone 266
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.33 inches; B = 14.3 inches.
Separation: AB = 4.88 miles.
Distance (LY): 135
Total luminosity (Suns): 12.4
h4848
Rating: 2 E
HD 147553
Position: 1624-3312
A
B
C
Magnitude
6.45
7.09
9.41
Separation
—
6.2 +
94.2 +
PA
—
153 356 -
Year
—
1993
1956
Spectra
A0 V
A0 V
Colors
W
W
B?
Notes:
AB 1836: 6.0 @ 155. 40 measurements.
AC 1846: 93.3 @ 357. 7 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches; B = 9.00 inches.
Separation: AB = 3.68 miles; AC = 56.0 miles.
Distance (LY): 381
Total luminosity (Suns): 42
h4840
Rating: 4 E
HD 146368; SAO 207516
Position: 1617-3449
A
B
Magnitude
8.35
9.10
Separation PA
—
—
4.9 +
299 +
- 16 -
Year
—
1991
Spectra
F8 V
G5
Colors
W
Y
Zone 266
Notes:
1836: 3.7 @ 295. 26 measurements.
Observations:
C8 at 83x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches; B = 20.7 inches.
Separation: AB = 2.30 miles.
Distance (LY): 301
Total luminosity (Suns): 4.72
Perth Obs 128
Rating: 5 E
HD 143673; SAO 207269
Position: 1603-3210
A
B
Magnitude
8.75
10.94
Separation PA
—
—
5.9 +
131 -
Year
—
1991
Notes:
1911: 5.5 @ 140. 5 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches.
Separation: AB = 2.07 miles.
Distance (LY): 225
Total luminosity (Suns): 1.4
- 17 -
Spectra
G5 V
Colors
Y
?
Zone 266
Moderate
h4832
Howe 82; HD 144455; SAO 207342
Rating: 4 M
Position: 1607-3343
A
B
C
BC
Magnitude
7.94
10.69
10.71
Separation PA
—
—
38.5 +!! 352 +
23.7 +!
20 +
Year
—
1991
Spectra
A0 IV
Colors
Y
W?
W?
1919
Notes:
AB 1837: 15.0 @ 343. 6 measurements.
BC 1837: 15.0 @ 18. 2 measurements.
Observations:
C8 at 280x.
h4843
Rating: 5 M
HD 147149; SAO 207586
Position: 1621-3318
A
B
Magnitude
7.39
11.80
Separation PA
—
—
12.3 268 -
Year
—
1991
Notes:
1837: 15.0 @ 271. 10 measurements.
Observations:
C8 at 206x. Use high power and averted vision.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches.
Separation: AB = 7.63 miles.
Distance (LY): 398
Total luminosity (Suns): 14.23
- 18 -
Spectra
F5 V
Colors
W
?
Zone 266
Zone 266, Map 3
Double Stars
Easy
Eta Lup
Dunlop 197; Rumker 21; HD 143118; SAO 207208
Rating: 3 E
Position: 1600-3823
A
B
C
Magnitude
3.42
7.84
9.27
Separation
—
14.9 +
115.0 +!!
PA
—
19 148 -!
Year
—
1991
1935
Spectra
B2 IV
Colors
Y
L
No
Notes:
AB 1834: 13.5 @ 22. 30 measurements.
AC 1825: 60.0 @ 245. 6 measurements.
This star belongs to the Pleiades group.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.2 inches.
Separation: AB = 11.5 miles; AC = 88.5 miles.
Distance (LY): 493
Total luminosity (Suns): 864
Dunlop 199
V856 Sco; See 265; HD 144667; SAO 207368
Rating: 3 E
Position: 1608-3905
A
B
C
Magnitude
6.65
13.30
7.00
Separation
—
16.3 44.5 +!!
PA
—
298 =
184 -
- 19 -
Year
—
1920
1994
Spectra
A1 IV
A8
Colors
pB
No
W
Zone 266
Notes:
AB 1897: 16.4 @ 298. 3 measurements. The stars share common proper motion
even though Hipparcos gives different distances (790 and 680 light years).
AC 1826: 12.0 @ 190. 23 measurements.
A is a semiregular variable V856 Sco. There are indications of a 14 day spectroscopic
companion.
There is an extended circumstellar atmosphere, and C shares common PM and radial
velocity.
Observations:
C8 at 83x. The dark nebula BE 149 lies just SE of here.
Howe 81
Rating: 4 E
SAO 207220
Position: 1601-3606
A
B
Magnitude
8.21
8.83
Separation PA
—
—
6.6 +
103 +
Year
—
1991
Notes:
1876: 4.0 @ 100. 17 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches.
Separation: AB = 3.15 miles.
Distance (LY): 306
Total luminosity (Suns): 5
- 20 -
Spectra
G1 V
Colors
W
pO
Zone 266
Innes 91
Rating: 4 E
HD 146954; SAO 207574
Position: 1620-3925
A
B
Magnitude
6.11
10.22
Separation PA
—
—
15.6 +
292 +
Year
—
1965
Spectra
A0 V
Colors
W
?
Notes:
1891: 12.0 @ 285. 10 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 12.1 miles.
Distance (LY): 496
Total luminosity (Suns): 73
See 256
Rating: 5 E
HD 143278; SAO 207228
Position: 1601-3559
A
B
Magnitude
8.20
11.90
Separation PA
—
—
12.1 130 +
Notes:
1897: 13.6 @ 127. 5 measurements.
Observations:
C8 at 104x.
- 21 -
Year
—
1930
Spectra
K1 III
Colors
Y
?
Zone 266
Theta Lup
h4831; HD 144294; SAO 207332
Rating: 5 E
Position: 1607-3648
A
B
Magnitude
5.73
11.80
Separation PA
—
—
40.9 +
358 -
Year
—
1919
Spectra
F1 V
Colors
W
W
Notes:
1834: 40.0 @ 359. 4 measurements. This star is a member of the Pleiades group.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches.
Separation: AB = 26.2 miles.
Distance (LY): 411
Total luminosity (Suns): 281.25
Difficult
Cordoba 193
Rating: 5 D
HD 144503
Position: 1608-3802
A
B
Magnitude
8.14
9.07
Separation PA
—
—
1.9 -! 195 +!
Notes:
AB 1875: 9.1 @ 73. 43 measurements.
The stars have different proper motions.
Observations:
C8 at 280x. Notched.
- 22 -
Year
—
1991
Spectra
G5 V
Colors
Y
Y
Zone 266
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches.
Separation: AB = 4,170 feet.
Distance (LY): 269
Total luminosity (Suns): 5.6
Deep Sky Objects
Difficult
NGC 6139
Other Names: Dunlop 536
Rating: 5 D
Position: 1628-3851
Type: Gc
Dimensions: 2'
Class: 2
Magnitude: 10.0
Notes:
James Dunlop found this cluster in the 1820's.
The horizontal branch is 17.5m.
Absorption amounts to 3.3m.
Observations:
C8 at 104x. A featureless smudge in a bleak field.
C11 at 98x. Very faint and small and in the soup; blurry patch. An 11m star lies 5
min S. Class 3.
Model (where the Sun is a baseball):
Its diameter would be 5,430 miles.
Distance (LY): 32,900
Luminosity (suns): 8,500
- 23 -
Zone 266
Zone 266, Map 4
Double Stars
Easy
h1292
Rating: 3 E
HD 149867; SAO 184509
Position: 1638-2514
A
B
C
BC
Magnitude
10.12
10.47
13.00
Separation PA
—
—
23.3 +
245 +
14.5 =
132 +
Year
—
1991
Spectra
A3
Colors
W
W
No
1988
Notes:
1828: 20.0 @ 240. 10 measurements.
BC 1834: 14.5 @ 129. 2 measurements.
There are five more extremely faint comes (all claimed by Abt).
Observations:
C11 at 98x. This system lies in a N-S chain of four stars.
h4887
Rating: 3 E
HD 151394
Position: 1648-2845
A
B
Magnitude
9.77
10.21
Separation PA
—
—
20.3 +
95 +
Notes:
1834: 18.0 @ 90. 7 measurements.
Observations:
C11 at 98x.
- 24 -
Year
—
1991
Spectra
G6/8 III:
Colors
Y!
W
Zone 266
h4902
Rating: 3 E
ADS 10271; HD 152989; SAO 184838
Position: 1658-2737
A
B
Magnitude
7.86
9.52
Separation PA
—
—
11.2 30 -
Year
—
1992
Spectra
A0 IV
Colors
G
O?
Notes:
1834: 12.0 @ 32. 13 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 3.79 miles.
Distance (LY): 217
Total luminosity (Suns): 3.2
h4859
Rating: 4 E
HD 148671
Position: 1631-2820
A
B
Magnitude
10.10
10.19
Separation PA
—
—
11.2 275 =
Year
—
1991
Spectra
K3 V
Colors
Y
bW
Notes:
1834: 12.0 @ 275. 10 measurements.
May be optical because Hipparcos gives different distances (262 and 200 light years).
Observations:
C11 at 98x.
- 25 -
Zone 266
h4878
Rating: 4 E
ADS 10143
Position: 1640-2800
A
B
Magnitude
7.48
8.36
Separation PA
—
—
8.1 359 -
Year
—
1991
Spectra
F0 V
Colors
W
W
Notes:
1836: 10.0 @ 1. 16 measurements.
Observations:
C8 at 104x. Nice, but faint.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches.
Separation: AB = 5.92 miles.
Distance (LY): 469
Total luminosity (Suns): 14
Moderate
h4895
Rating: 5 M
HD 152346; SAO 184760
Position: 1654-2857
A
B
Magnitude
8.42
12.18
Separation PA
—
—
23.0 +
97 +
Notes:
1834: 15.0 @ 95. 3 measurements.
Observations:
C11 at 98x.
- 26 -
Year
—
1987
Spectra
A0 V
Colors
W
?
Zone 266
Zone 266, Map 5
Reference Star
Epsilon Sco (26 Sco; HD 151680; SAO 208078)
Position: 1650-3418
Mag : 2.27
Spectrum : K2 III
Color : O
Double Stars
Easy
Bos 1328
Rating: 4 E
HD 152700; SAO 208213
Position: 1656-3131
A
B
Magnitude
8.11
10.21
Separation PA
—
—
117.6
40
Year
—
1934
Notes:
1 measurement.
Observations:
C8 at 104x. It lies at the S end of a good field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.1 inches.
Separation: AB = 114 miles.
Distance (LY): 620
Total luminosity (Suns): 23
- 27 -
Spectra
A3 IV
Colors
W
W
Zone 266
Howe 84
Rating: 5 E
SAO 207907
Position: 1641-3419
A
B
Magnitude
8.76
10.10
Separation PA
—
—
10.4 +
111 +
Year
—
1956
Spectra
K0 III
Colors
W
?
Notes:
1876: 8.0 @ 110. 6 measurements.
Observations:
C8 at 104x.
Moderate
h4903
See 508 (B); HD 153002; SAO 208244
Rating: 5 M
Position: 1658-3013
A
B
C
Magnitude
8.44
9.62
9.77
Separation
—
1.5 +
18.6 +
PA
—
189 91 +
Year
—
1991
1991
Notes:
AB 1898: 1.3 @ 190. 12 measurements.
AC 1834: 15.0 @ 89. 8 measurements.
Observations:
C8 at 104x. Use averted vision to see C.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.80 inches.
Separation: AB = 1.52 miles; AC = 18.9 miles.
Distance (LY): 650
Total luminosity (Suns): 14
- 28 -
Spectra
F3 V
Colors
yW
No
W
Zone 266
Difficult
Innes 95
Rating: 5 D
HD 148950; SAO 207759
Position: 1633-3332
A
B
Magnitude
7.51
9.70
Separation PA
—
—
1.8 +
0+
Year
—
1991
Spectra
A0 V
Colors
yW
W
Notes:
1896: 1.5 @ 350. 10 measurements.
Observations:
C8 at 516x.
Zone 266, Map 6
Reference Star
Mu 1 Sco (HD 151890; SAO 208102)
Position: 1652-3803
Mag : 3.00
Assumed distance: 820 light years
Spectrum : B1.5 IV
Color : bW
Assumed luminosity (suns): 3,400
Notes:
This star is a spectroscopic binary (1.4463 day period) and a member of the Pleiades
Group.
- 29 -
Zone 266
Double Stars
Easy
Dunlop 209
Rating: 4 E
HD 151315; SAO 208043
Position: 1648-3653
A
B
Magnitude
7.47
8.36
Separation PA
—
—
23.6 +! 139 -
Year
—
1991
Spectra
A5 IV
A
Colors
W?
O
Notes:
AB 1826: 14 @ 150. 17 measurements.
The stars show similar proper motions.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.15 inches; B = 8.31 inches.
Separation: AB = 10.9 miles.
Distance (LY): 297
Total luminosity (Suns): 9.9
h4889
Rating: 4 E
HD 151771; SAO 208089
Position: 1651-3731
A
B
Magnitude
6.30
8.45
Separation PA
—
—
7.1 +
6-
Notes:
1834: 4.0 @ 7. 23 measurements.
Star A is a spectroscopic binary.
- 30 -
Year
—
1991
Spectra
B8 IIIp
Colors
W
L?
Zone 266
Observations:
C8 at 206x. Others note pB, pR.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.0 inches.
Separation: AB = 9.41 miles.
Distance (LY): 850
Total luminosity (Suns): 197
Russell 286
Rating: 5 E
HD 152637; SAO 208206
Position: 1656-3711
A
B
Magnitude
7.41
10.31
Separation PA
—
—
17.3 +
317 -
Year
—
1991
Spectra
K0 III
Colors
W
?
Notes:
1881: 17.1 @ 318. 8 measurements.
Observations:
C8 at 206x. Use high power and averted vision.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 14.0 miles.
Distance (LY): 520
Total luminosity (Suns): 22
Moderate
Jessup 700
V883 Sco; HD 152901; SAO 208238
Rating: 4 M
Position: 1658-3800
A
B
Magnitude
7.40
11.50
Separation PA
—
—
9.1 130 -
- 31 -
Year
—
1987
Spectra
B5 V
Colors
W
dO
Zone 266
Notes:
1929: 9.3 @ 131. 4 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.4 inches.
Separation: AB = 1.00 mile.
Distance (LY): 68
Total luminosity (Suns): 0.41
h4870
Rating: 5 M
HD 149886; SAO 207878
Position: 1639-3713
A
B
Magnitude
5.93
11.41
Separation PA
—
—
30.9 +
10 =
Year
—
1919
Notes:
1834: 30.0 @ 10. 5 measurements.
Observations:
C8 at 206x. Use high power and averted vision.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.60 inches.
Separation: AB = 20.9 miles.
Distance (LY): 434
Total luminosity (Suns): 65.4
- 32 -
Spectra
B9 V
Colors
W
?
Zone 266
Difficult
See 313
Rating: 5 D
HD 152767; SAO 208225
Position: 1657-3826
A
B
Magnitude
8.11
9.79
Separation PA
—
—
2.4 231 -
Year
—
1991
Spectra
F0 IV/V
Colors
W
W
Notes:
1897: 2.5 @ 233. 11 measurements.
Observations:
C8 at 280x. Notched.
Eddy O'Connor (Terara, NSW, Australia; 8" Dob) saw them as Y, B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 2.50 miles.
Distance (LY): 670
Total luminosity (Suns): 36
Deep Sky Objects
Moderate
NGC 6242
Other Names: Melotte 155; Collinder 317; Raab 115
Rating: 3 M
Position: 1656-3930
Type: Oc
Dimensions: 9'
Class: I 3m
Cluster population: 45
Magnitude: 6.4
Notes:
This cluster is 51 million years old, with its youngest stars being B5 types.
The brightest star is 7.3m.
- 33 -
Zone 266
Observations:
C8 at 83x. Somewhat sparse and grainy. Note the trapezoid (8m, 10m, 10m, 10m) at
the center. At high power, many more stars come into view.
Model (where the Sun is a baseball):
Its diameter would be 3,290 miles with stars 453 miles apart.
Distance (LY): 3,900
Luminosity (suns): 2,930
- 34 -
Zone 266
Zone 266 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
Brisbane 11
1609-3239
2E
2
55G
1620-3054
2E
2
h4848
1624-3312
2E
2
Eta Lup
1600-3823
3E
3
h4826
1602-2943
3E
1
Dunlop 199
1608-3905
3E
3
H N 39
1625-2942
3E
1
h1292
1638-2514
3E
4
h4887
1648-2845
3E
4
h4902
1658-2737
3E
4
Howe 81
1601-3606
4E
3
12 Sco
1612-2825
4E
1
h4840
1617-3449
4E
2
Innes 91
1620-3925
4E
3
Sigma Sco
1621-2535
4E
1
Bos 1319
1621-2958
4E
1
h4859
1631-2820
4E
4
h4878
1640-2800
4E
4
Dunlop 209
1648-3653
4E
6
h4889
1651-3731
4E
6
Component
A
B
A
B
A
B
C
A
B
C
A
B
A
B
C
A
B
A
B
C
BC
A
B
A
B
A
B
A
B
A
B
A
B
A
B
a
A
B
C
A
B
A
B
A
B
A
B
- 35 -
Mag
6.18
6.71
5.53
7.29
6.45
7.09
9.41
3.42
7.84
9.27
9.81
10.06
6.65
13.30
7.00
5.40
6.60
10.12
10.47
13.00
9.77
10.21
7.86
9.52
8.21
8.83
5.90
7.90
8.35
9.10
6.11
10.22
2.89
8.42
5.16
9.91
10.40
11.40
10.10
10.19
7.48
8.36
7.47
8.36
6.30
8.45
Separation
—
7.5 -!
—
23.2 —
6.2 +
94.2 +
—
14.9 +
115.0 +!!
—
4.9 +
—
16.3 44.5 +!!
—
4.6 +
—
23.3 +
PA
—
85 —
319 —
153 94.2 +
—
19 115.0 +!!
—
249 -?
—
298 =
44.5 +!!
—
357 +
—
245 +
14.5 =
—
20.3 +
—
11.2 —
6.6 +
—
4
—
4.9 +
—
15.6 +
—
20 0.3
—
8.0 +
1.1 —
11.2 —
8.1 —
23.6 +!
—
7.1 +
132 +
—
95 +
—
30 —
103 +
—
75 —
299 +
—
292 +
—
273 +
292
—
139 1.1 —
275 =
—
359 —
139 —
6-
Zone 266
Designation
Position
Rating
Map
Bos 1328
1656-3131
4E
5
See 255
1600-2610
5E
1
See 256
1601-3559
5E
3
See 260
1602-2822
5E
1
Perth Obs 128
1603-3210
5E
2
Glasenapp 5
1607-2743
5E
1
Theta Lup
1607-3648
5E
3
Glasenapp 4
1610-2753
5E
1
Bur 40
1612-2733
5E
1
Howe 84
1641-3419
5E
5
Russell 286
1656-3711
5E
6
h4832
1607-3343
4M
2
Stone 32
1627-2711
4M
1
Jessup 700
1658-3800
4M
6
Bur 38
1603-2501
5M
1
h4843
1621-3318
5M
2
h4870
1639-3713
5M
6
h4895
1654-2857
5M
4
h4903
1658-3013
5M
5
Cordoba 193
1608-3802
5D
3
Alpha Sco
1629-2626
5D
1
Innes 95
1633-3332
5D
5
See 313
1657-3826
5D
6
Component
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
BC
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
- 36 -
Mag
8.11
10.21
8.70
14.00
10.60
8.20
11.90
8.81
10.09
8.75
10.94
8.19
10.70
5.73
11.80
7.90
10.77
7.84
9.59
11.65
8.76
10.10
7.41
10.31
7.94
10.69
10.71
8.20
11.44
7.40
11.50
7.03
9.43
7.39
11.80
5.93
11.41
8.42
12.18
8.44
9.62
9.77
8.14
9.07
1.06
5.40
7.51
9.70
8.11
9.79
Separation
—
117.6
—
12.1 16.7 +
—
12.1 —
6.1 —
5.9 +
—
35.4 +
—
40.9 +
—
54.3 —
4.9 98.4
—
10.4 +
—
17.3 +
—
38.5 +!!
PA
—
40
—
21 =
16.7 +
—
130 +
—
21 —
131 —
221 —
358 —
295 +
—
351 98.4
—
111 +
—
317 —
352 +
23.7 +!
—
11.6 +
—
9.1 —
4.5 +
—
12.3 —
30.9 +
—
23.0 +
—
1.5 +
18.6 +
—
1.9 -!
—
2.8 +
—
1.8 +
—
2.4 -
20 +
—
349 +
—
130 —
346 —
268 —
10 =
—
97 +
—
189 18.6 +
—
195 +!
—
277 +
—
0+
—
231 -
Zone 266
Deep Space Objects
Object
NGC 6121
IC 4605
NGC 6242
IC 4591
NGC 6144
NGC 6139
Position
1624-2632
1630-2506
1656-3930
1612-2756
1627-2602
1628-3851
Rating
2E
5E
3M
5M
4D
5D
Map
1
1
6
1
1
3
Type
Gc (9)
Gn (R)
Oc (I 3m)
Gn
Gc (11)
Gc (2)
- 37 -
Specifications
Surface
Mag
Br
7.4
—
6.4
—
10.0
10.0
Population
10,000
45