Zone 268, Master Map
M8
Sagittarius
-26°00'
M28
λ Kaus Borealis
σ Nunki
φ
γ1
M70
M69
g
-30°00'
γ2 Alnasl
M54
Octans
Scorpius
d
-32°00'
δ Kaus Media
ζ Ascella
-28°00'
c
f
τ
M6
-34°00'
ε Kaus Australis
γ
Corona Australis
η
h
ε
-36°00'
M7
e
Shaulaλ
α
λ
κ2
κ1
κ
β
δ
19h 20m
ι2
µ
19h 04m 18h 56m 18h 48m 18h 40m 18h 32m
18h 16m 18h 08m 18h 00m
υ
-38°00'
ψ
-24°00'
Normal View
Zone Master, Normal View, 10 deg FOV
ι1
17h 44m 17h 36m 17h 28m
Zone 268, Map 1
Normal Image
NGC 6544
Kaus Borealis
Lambda Sgr
USNO 21
Harvard 148
NGC 6553
Terzian 10
Bur 133
Bos 387
Terzian 9
Holden 32
Cordoba 225
Stone 40
Stone 38
Bos 2865
NGC 6540
Barnard 86
NGC 6520
-29°00'
Bur 244
-28°00'
λ
Bur 285
-27°00'
H N 125
-26°00'
M28
NGC 6626
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
γ1
Rousseau 31
δ
18h 30m
18h 25m
Kaus Media
18h 20m
18h 15m
18h 10m
NGC 6522
NGC 6528
18h 05m
18h 00m
Zone 268, Map 1
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-25°00'
Kaus Borealisλ
Lambda Sgr
USNO 21
-26°00'
NGC 6553
Terzian 10
Bur 133
Bos 387
-27°00'
Terzian 9
Holden 32
Cordoba 225
Stone 40
Stone 38
Barnard 86
NGC 6520 NGC 6540 Bur 244
-29°00'
Bos 2865
-28°00'
Harvard 148
M28
NGC 6626
Bur 285
NGC 6544
γ1
Rousseau 31
δ
18h 00m
NGC 6522
NGC 6528
18h 05m
18h 10m
18h 15m
18h 20m
Kaus Media
18h 25m
18h 30m
Zone 268, Map 2
Normal Image
NGC 6522
NGC 6528
NGC 6624
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
γ2 Gamma Sgr
Alnasl
-31°00'
Bur 245
h5037
PK 2-9.1
NGC 6558
-32°00'
NGC 6569
-34°00'
-33°00'
M69
h5036
ε
Epsilon Sgr
Kaus Australis
Cordoba 223
h5012
Olivier 17
18h 30m
18h 25m
18h 20m
18h 15m
18h 10m
18h 05m
18h 00m
Zone 268, Map 2
Mirror Image
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 6522
NGC 6528
h5003
γ2
NGC 6624
Alnasl
Gamma Sgr
-31°00'
Bur 245
h5037
PK 2-9.1
-32°00'
NGC 6569
-34°00'
-33°00'
NGC 6558
h5036
Epsilon Sgrε
Cordoba 223
Kaus Australis
h5012
Olivier 17
18h 00m
18h 05m
18h 10m
18h 15m
18h 20m
18h 25m
18h 30m
Zone 268, Map 3
Normal Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Olivier 17
Bos 424
Sagittarius
Howe 88
Eta Sgr
Dunlop 219
h5000
Corona Australis
-37°00'
η
-36°00'
Harvard 283
Bos 934
-38°00'
Innes 230
-39°00'
Kappa CrA
18h 30m
18h 25m
18h 20m
18h 15m
18h 10m
18h 05m
18h 00m
Zone 268, Map 3
Mirror Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Olivier 17
Trumpler 30
Bos 424
Sagittarius
-36°00'
Harvard 283
Russell 306
Howe 88
η
Eta Sgr
-37°00'
h5000
Bos 934
-38°00'
Innes 230
-39°00'
κ1
κ2
Cordoba 222
18h 00m
18h 05m
18h 10m
18h 15m
18h 20m
18h 25m
18h 30m
Zone 268, Map 4
Normal Image
NGC 6644
Argelander 32
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-26°00'
NGC 6638
-27°00'
σ Nunki
Sigma Sgr
-28°00'
φ
-29°00'
h5051
See 356
19h 00m
18h 55m
18h 50m
18h 45m
18h 40m
18h 35m
18h 30m
Zone 268, Map 4
Mirror Image
H N 125
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 6644
Argelander 32
-26°00'
NGC 6638
σ
Nunki
Sigma Sgr
-27°00'
USNO 6
-28°00'
φ
-29°00'
h5051
See 356
18h 30m
18h 35m
18h 40m
18h 45m
18h 50m
18h 55m
19h 00m
Zone 268, Map 5
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-30°00'
See 356
-32°00'
Perth Obs 206
-31°00'
M54
NGC 6715
M70
NGC 6681
-33°00'
NGC 6637 M69
NGC 6652
-34°00'
Glasenapp 15
Stone 62
19h 00m
18h 55m
18h 50m
18h 45m
18h 40m
18h 35m
18h 30m
Zone 268, Map 5
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-30°00'
See 356
-31°00'
M54
NGC 6715
Perth Obs 206
-32°00'
PK 2-9.1
-33°00'
M70
NGC 6681
M69
NGC 6637
NGC 6652
-34°00'
Glasenapp 15
Stone 62
18h 30m
18h 35m
18h 40m
18h 45m
18h 50m
18h 55m
19h 00m
Zone 268, Map 6
Normal Image
-36°00'
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-37°00'
NGC 6723
-38°00'
ε
λ Lambda CrA
Kappa CrA
-39°00'
κ1
κ2
19h 00m
18h 55m
18h 50m
18h 45m
18h 40m
18h 35m
18h 30m
Zone 268, Map 6
Mirror Image
λ
-38°00'
ε
-37°00'
-36°00'
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Lambda CrA
-39°00'
κ1
κ2 Kappa CrA
18h 30m
18h 35m
18h 40m
18h 45m
18h 50m
18h 55m
19h 00m
Zone 268
4 Reference Stars, 36 Double Stars, 2 Planetary Nebulae,
2 Open Clusters, 12 Globular Clusters
A
Harvard 148 ........................................... 8
Harvard 283 ......................................... 25
Holden 32............................................... 4
Howe 88............................................... 24
Argelander 32 ...................................... 27
B
Barnard 86 ........................................... 14
Bos 2865 ................................................ 8
Bos 387 .................................................. 6
Bos 424 ................................................ 24
Bos 934 ................................................ 26
Bur 133 ................................................ 10
Bur 244 ................................................ 10
Bur 245 ................................................ 18
Bur 285 .................................................. 5
I
Innes 230.............................................. 25
K
Kappa CrA ........................................... 37
L
Lambda CrA ........................................ 37
Lambda Sgr............................................ 3
C
N
Cordoba 223 ........................................ 17
Cordoba 225 .......................................... 8
NGC 6520 ............................................ 11
NGC 6522 ............................................ 19
NGC 6528 ............................................ 21
NGC 6540 ............................................ 12
NGC 6544 ............................................ 13
NGC 6553 ............................................ 13
NGC 6558 ............................................ 21
NGC 6569 ............................................ 22
NGC 6624 ............................................ 20
NGC 6637 ............................................ 34
NGC 6638 ............................................ 31
NGC 6644 ............................................ 30
NGC 6652 ............................................ 35
NGC 6681 ............................................ 35
NGC 6715 ............................................ 36
E
Epsilon Sgr .......................................... 14
Eta Sgr ................................................. 23
G
Gamma Sgr .......................................... 15
Glasenapp 15 ....................................... 32
H
H N 125 ................................................. 9
h5012 ................................................... 15
h5036 ................................................... 16
h5037 ................................................... 17
h5051 ................................................... 27
-1-
Zone 268
O
S
Olivier 17............................................. 18
Perth Obs 206 ...................................... 32
PK 2-9.1............................................... 22
See 356................................................. 29
Sigma Sgr............................................. 28
Stone 38 ................................................. 7
Stone 40 ................................................. 9
Stone 62 ............................................... 33
R
U
Rousseau 31........................................... 6
USNO 21................................................ 4
USNO 6.................................................. 5
P
-2-
Zone 268
Zone 268, Map 1
Reference Star
Lambda Sgr (22 Sgr; Kaus Borealis, "the northern part of the bow"; HD 169916;
SAO 186841)
Position: 1828-2525
Mag : 2.82
Spectrum : K1 III
Color : Y
Assumed distance: 77 light years
Assumed luminosity (suns): 52
Notes:
This star is a member of the Hyades group. It is also an infra-red source.
It has a diameter of 0.0044".
From James Kaler's Star Notes:
Though cool (4,700 Kelvin) by solar standards, Kaus Borealis is on the warm side of
class K, and is an orange giant star rather similar to Gemini's Pollux. The radius derived
from temperature and luminosity and from the star's measured angular diameter (0.0044
seconds of arc) agree nicely at 11 times solar, not all that much for a star called a giant.
With a mass about 2.3 times solar, Kaus Borealis is a prime example of what astronomers
call a "clump star," one that though dying is currently quite stable and fusing helium into
carbon and oxygen in its deep core (the name "clump" coming from a congregation of
such stars at about this temperature and luminosity).
It is also a modest X-ray source, showing it to have magnetic activity rather like that
found on the Sun, something of a surprise. More to home, Kaus Borealis lies in a rich part
of the Milky Way, the handle of the Little Milk Dipper pointing to the famed "Lagoon
Nebula," a naked eye interstellar cloud that marks a region of fierce star formation and is
a lovely sight in binoculars. Just to the west of Kaus Borealis and above the Lagoon lies
the winter solstice, the southern-most point of the Sun's path, the star the closest bright
marker.
-3-
Zone 268
Double Stars
Easy
Holden 32
Rating: 3 E
ADS 10995
Position: 1803-2705
A
B
C
Magnitude
8.35
9.40
11.50
Separation
—
5.2 +
43.3
PA
—
101 68
Year
—
1979
1909
Spectra
G5 V
Colors
Y
O
No
Notes:
AB 1881: 4.5 @ 102. 12 measurements.
AC 1 measurement.
Observations:
C8 at 104x.
USNO 21
V3792 Sgr; ADS 11069; HD 165814; SAO 186350
Rating: 3 E
Position: 1809-2528
A
B
Magnitude
6.76
8.70
Separation PA
—
—
13.5 =
65 -
Year
—
1991
Spectra
B4 III'
Colors
W
O
Notes:
1877: 13.5 @ 66. 4 measurements. Star A is a spectroscopic binary with a 2.2481
day period. There appears to be mass transfer going on too.
Hipparcos/Tycho data show different distances for these stars; they may be optical.
Observations:
C8 at 104x.
-4-
Zone 268
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.5 inches.
Separation: AB = 67.4 miles; Aa = 10.8 inches.
Distance (LY): 3,200
Total luminosity (Suns): 1,870
USNO 6
Rating: 3 E
HD 170141; SAO 186863
Position: 1829-2635
A
B
Magnitude
6.68
8.10
Separation PA
—
—
41.9 +
182 -
Year
—
1991
Spectra
A3 III
Colors
W
W
Notes:
1890: 41.8 @ 183. 10 measurements.
Observations:
C8 at 104x. A nice 6m/9m pair (30", PA 130) lies 12 min SW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 26.0 miles.
Distance (LY): 397
Total luminosity (Suns): 33
Bur 285
Rating: 4 E
ADS 11214; HD 167550
Position: 1817-2500
A
B
Magnitude
9.02
9.77
Separation PA
—
—
59.7 141 +
Year
—
1991
Notes:
1874: 60.0 @ 140. 11 measurements.
There is a 10.30m companion to A at 1.6 @ 316 (1943).
-5-
Spectra
A0 IV
Colors
W
pO
Zone 268
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 23.4 miles.
Distance (LY): 251
Total luminosity (Suns): 2.3
Bos 387
Rating: 4 E
ADS 11245
Position: 1819-2644
A
B
C
D
Magnitude
8.55
9.88
10.73
14.00
Separation
—
8.8 0.7 =
4.2
PA
—
37 +
168 +
322
Year
—
1966
1935
1927
Spectra
B9 V
Colors
W
W
No
No
Notes:
AB 1927: 9.0 @ 36. 2 measurements.
AC 1927: 0.7 @ 167. 2 measurements.
AD 1 measurement.
Observations:
C11 at 98x.
Rousseau 31
Rating: 4 E
HD 169141; SAO 186775
Position: 1824-2936
A
B
Magnitude
8.05
8.58
Separation PA
—
—
46.0 176 -
Year
—
1991
Spectra
K3/K4 III
Colors
Y
O
Notes:
1896: 54.9 @ 195. 8 measurements. Hipparcos shows these stars to be at the same
distance.
-6-
Zone 268
This previously uncataloged double star was a Hipparcos double entry system.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 53.4 inches.
Separation: AB = 10.8 miles.
Distance (LY): 150
Total luminosity (Suns): 1.65
Stone 38
Rating: 5 E
ADS 10974
Position: 1802-2741
A
B
Magnitude
8.20
9.40
Separation PA
—
—
6.4 84 -
Year
—
1926
Spectra
A0 V
Colors
W
pO
Notes:
1877: 6.5 @ 85. 4 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical.
Observations:
C8 at 104x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 1.45 miles.
Distance (LY): 146
Total luminosity (Suns): 1.2
-7-
Zone 268
Harvard 148
Rating: 5 E
ADS 11009
Position: 1804-2529
A
B
Magnitude
10.02
10.11
Separation PA
—
—
4.6 17 +
Year
—
1966
Spectra
B8II/III
Colors
W
W
Notes:
1868: 5.4 @ 15. 10 measurements.
Observations:
C11 at 98x.
Bos 2865
Rating: 5 E
HD 169558; SAO 186811
Position: 1826-2749
A
B
Magnitude
9.82
11.90
Separation PA
—
—
11.3
296
Year
—
1964
Spectra
B8/9II
Colors
W
?
Notes:
1 measurement.
Observations:
C11 at 98x. There is a nice, rich asterism (almost like a loose open cluster) 1 min W.
Cordoba 225
Rating: 5 E
ADS 11327
Position: 1826-2725
A
B
C
Magnitude
9.19
9.40
9.40
Separation
—
5.9 53.1
PA
—
359 +
84
-8-
Year
—
1987
1987
Spectra
F2 V
Colors
W
W
No
Zone 268
Notes:
AB 1896: 6.1 @ 358. 9 measurements.
AC 1 measurement.
Observations:
C8 at 104x. It is the western vertex of a narrow 9m triangle of stars.
Moderate
H N 125
Rating: 2 M
ADS 11378; HD 170121; SAO 186864
Position: 1829-2503
A
B
Magnitude
7.40
8.30
Separation PA
—
—
2.6 105 =
Year
—
1991
Spectra
G2 V
Colors
W
W
Notes:
1878: 3.1 @ 105. 31 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.30 inches.
Separation: AB = 3,960 feet.
Distance (LY): 185
Total luminosity (Suns): 4.2
Stone 40
Rating: 3 M
ADS 10984
Position: 1802-2731
A
B
Magnitude
8.49
9.31
Separation PA
—
—
3.0 =
162 -
-9-
Year
—
1991
Spectra
B8 V
Colors
bW
Y
Zone 268
Notes:
1876: 3.0 @ 163. 17 measurements.
Observations:
C8 at 280x. Moderate field.
Bur 244
Rating: 3 M
ADS 11084
Position: 1809-2752
A
B
Magnitude
7.23
9.18
Separation PA
—
—
2.2 +
265 +
Year
—
1991
Spectra
G5 IV
K0 III
Colors
Y
O
Notes:
1874: 2.0 @ 253. 32 measurements.
Observations:
C8 at 206x. It lies at the W end of a chain.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches; B = 26.0 inches.
Separation: AB = 2.16 miles.
Distance (LY): 630
Total luminosity (Suns): 40
Difficult
Bur 133
Rating: 5 D
ADS 11354; HD 169851; SAO 186837
Position: 1828-2638
A
B
Magnitude
6.31
7.17
Separation PA
—
—
0.9 243 -
Notes:
1874: 1.8 @ 266. 48 measurements.
- 10 -
Year
—
1996
Spectra
A5 V
F2 V
Colors
W
W
Zone 268
Observations:
C8 at 280x. Notched.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.50 inches; B = 11.0 inches.
Separation: AB = 1,850 feet.
Distance (LY): 252
Total luminosity (Suns): 16.6
Deep Sky Objects
Moderate
NGC 6520
Rating: 2 M
Other Names: Melotte 187; Collinder 361; Raab 127, H VII 7
Astronomical League Program: Herschel 400 Club, Urban Deep Sky Club, Binocular
Deep Sky Club
Position: 1803-2754
Type: Oc
Class: I 2rn
Magnitude: 9.0
Dimensions: 6'
Cluster population: 60
Notes:
It is 54 million years old; the earliest spectrum
is an O type. Three Be stars are known to be
members. The brightest cluster star is 9m.
It lies 22,500 light years from the galactic center
and 260 light years below the galactic plane.
Observations:
C8 at 206x. V-shaped; note the dR star on the
NW side, and the dark nebula Barnard 86 on the W
edge.
- 11 -
NGC 6520
Open cluster (I 1 m; 60 stars)
Observed with C8 on 8/22/92
Magnification: 80x
Zone 268
C11 at 98x. Extremely rich group. It resembles a bat, with two eyes (stars 90" apart),
two curved wings, and a tight little body. With averted vision, it grows fatter (having just
eaten); with direct vision, only the eyes and wings dominate, with a hint of the body.
Model (where the Sun is a baseball):
Its diameter would be 3,030 miles with stars 773 miles apart.
Distance (LY): 5,140
Luminosity (suns): 580
NGC 6540
Other Names: Collinder 364, H II 198
Astronomical League Program: Herschel 400 Club
Rating: 4 M
Position: 1806-2749
Type: Oc
Dimensions: 1'
Class: I 1pn
Cluster population: 12
Magnitude: 11.0
Notes:
NGC 6540 was discovered by William Herschel in 1784 and cataloged as H II.198.
While Herschel classified it as a "faint nebula," indicated by his classification in the
second group of deepsky objects, this object was longly listed as open cluster, e.g. by
Collinder who designated it Cr 364. S. Djorgovski independently "rediscovered" it in
September 1986 without noting its identity, when looking for obscured globular clusters
in the IRAS Point Source Catalog, labeled it Djorg 3, and suspected it to be a globular
cluster (Djorgovski 1987). It was finaly Bica et.al. (1994) who identified it with the NGC
object, and confirmed its nature as a globular cluster.
[Source: http://www.seds.org/~spider/spider/MWGC/n6540.html]
Observations:
C8 at 104x. Faint, averted vision will be a big help in seeing it. It boasts two arcs of
stars and a dense center. Barbara Wilson has this interesting description: "Looks like a
little letter 'J' or a fingernail clipping." Rich field.
Model (where the Sun is a baseball):
Its diameter would be 1,130 miles with stars 1,240 miles apart.
Distance (LY): 12,100
Luminosity (suns): 460
- 12 -
Zone 268
NGC 6544
Other Names: Melotte 192; Collinder 366, H II 197
Astronomical League Program: Herschel 400 Club
Rating: 4 M
Position: 1807-2500
Type: Gc
Magnitude: 9.0
Dimensions: 1'
Notes:
The brightest stars are 12.8m and the horizontal branch is 15.0m.
Observations:
C8 at 104x. Unresolved. Very rich field.
C11 at 98x. Small, not resolved, not much brighter in the middle. Fairly uniform.
Class: 8.
Model (where the Sun is a baseball):
Its diameter would be 1,400 miles.
Distance (LY): 15,000
Luminosity (suns): 310,000
NGC 6553
Other Names: H IV 12
Astronomical League Program: Herschel 400 Club
Rating: 4 M
Position: 1809-2554
Type: Gc
Class: 11
Dimensions: 1.7'
Magnitude: 10.0
Notes:
The brightest stars are 14.7m and the horizontal branch is 16.2m.
It is dimmed 6.3 magnitudes by dust.
Observations:
C8 at 104x. Unresolved, and a faint star lies on the edge. Very rich field.
C11 at 98x. Class 10. Not resolved, it is faint and small. A wide pair (11 m) is 3 min
E.
- 13 -
Zone 268
Model (where the Sun is a baseball):
Its diameter would be 670 miles.
Distance (LY): 4,200
Luminosity (suns): 46,000
Barnard 86
Other Names: LDN 93; Ink Spot Nebula
Rating: 5 M
Position: 1803-2750
Type: Dn
Dimensions: 4'
Observations:
C8 at 104x. This is a "hole" in a rich field of faint stars.
Distance (LY): 6,200?
Zone 268, Map 2
Reference Stars
Epsilon Sgr (20 Sgr; Kaus Australis, "the southern part of the bow"; HD 169022;
SAO 210091)
Position: 1824-3423
Mag : 1.79
Spectrum : B9.5 IV
Color : bW
Assumed distance: 145 light years
Assumed luminosity (suns): 375
Notes:
The primary rotates at 140 kps and is 0.0014" in diameter.
From James Kaler's Star Notes:
Kaus Australis also demonstrates that astronomers can have trouble finding a place
even for prominent stars. It has traditionally been called a giant and assigned to blue class
B (at the cool end, B9.5), with a temperature of 9,200 K, while others have more recently
assigned it to hot-end class A as a "bright giant" (one notably more luminous than the
ordinary giants). The star is much brighter than its main sequence (hydrogen-fusing)
counterparts and is clearly in a more advanced state, having begun to die. With a mass
nearly four times solar, it probably has a core of helium that is shrinking and heating as it
prepares itself to fuse to carbon and oxygen. Both the temperature plus luminosity and
- 14 -
Zone 268
direct measurements of angular diameter agree that Kaus Australis is seven times bigger
than the Sun.
More confusing is the star's chemical composition. It was long thought to be a rare
"Lambda Bootis" star. Such stars seem to be highly depleted in metals. One explanation
is that during their development they accreted from interstellar space considerable gas
whose metal atoms had already been absorbed by interstellar dust. However, Kaus
Australis was later removed from the category. It may instead be a sort of "shell star" in
which its high rotation speed (over 70 times that of the Sun) was responsible for creating
a shell of gas that hides much of the star within. If nothing else, the star shows how much
we have yet to learn of the stellar science.
Gamma Sgr (10 Sgr; El Nasl, "the point" of the arrow; HD 165135; SAO 209696)
Position: 1806-3025
Mag : 2.98
Spectrum : K0 III
Color : O
Assumed distance: 96 light years
Assumed luminosity (suns): 45
Notes:
This star is a spectroscopic binary and an infra-red source. It is a member of the Wolf
630 Group.
Double Stars
Easy
h5012
Rating: 3 E
HD 165085; SAO 209693
Position: 1806-3437
A
B
Magnitude
8.59
9.13
Separation PA
—
—
23.3 189 -
Notes:
1835: 25.0 @ 194. 11 measurements.
The stars have different proper motions.
Observations:
C8 at 104x.
- 15 -
Year
—
1991
Spectra
K5
K2
Colors
O
O
Zone 268
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 35.6; B = 28.7 inches.
Separation: AB = 1.59 miles.
Distance (LY): 44
Total luminosity (Suns): 0.08
h5036
RS Sgr; HD 167647; SAO 209959
Rating: 3 E
Position: 1818-3406
A
B
C
D
CD
Magnitude
6.03
9.47
8.67
10.20
Separation
—
39.0 +
94.1 =
16.5
PA
—
86 41 =
Year
—
1962
1991
347
1919
Spectra
B4 IV
A
Colors
yG
O
W
W?
Notes:
AB 1890: 38.8 @ 87. 3 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical.
AC 1890: 94.1 @ 41. 9 measurements.
CD, no evidence of duplicity is seen by Hipparcos.
Star A is a spectroscopic binary with a 2.4157 day period and rotates at 186 kps. It is
also an Algol system.
Observations:
C8 at 83x. Star C looks brighter than B!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 15.0 inches; B = 8.85 inches.
Separation: AB = 53.6 miles; AC = 129 miles; CD = 22.7 miles.
Distance (LY): 880
Total luminosity (Suns): 285
- 16 -
Zone 268
Cordoba 223
Olivier 47; Dawson; HD 165210; SAO 209711
Rating: 4 E
Position: 1806-3418
A
B
C
BC
Magnitude
7.99
9.94
11.30
Separation PA
—
—
27.0
244
26.7
247
Year
—
1922
Spectra
B5 III
Colors
W
B
No
1922
Notes:
AB 1 measurement.
BC 1 measurement.
Observations:
C8 at 104x.
h5037
Rating: 4 E
HD 167363; SAO 209933
Position: 1816-3110
A
B
Magnitude
7.66
10.09
Separation PA
—
—
37.4 +
227 +
Year
—
1919
Notes:
1890: 36.8 @ 226. 2 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 18.7 miles.
Distance (LY): 320
Total luminosity (Suns): 8
- 17 -
Spectra
B5 II
Colors
bW
W
Zone 268
Olivier 17
Position: 1820-3500
A
B
Magnitude
10.27
12.00
Rating: 5 E
Separation PA
—
—
6.0 +
252 +
Year
—
1991
Spectra
G0
Colors
Y
O
Notes:
1909: 5.2 @ 251. 9 measurements.
Observations:
C8 at 104x.
Moderate
Bur 245
Rating: 4 M
HD 166023; SAO 209803
Position: 1810-3044
A
B
Magnitude
5.53
7.71
Separation PA
—
—
3.9 353 -
Year
—
1994
Notes:
1868: 4.2 @ 7. 39 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 2.19 miles.
Distance (LY): 360
Total luminosity (Suns): 63
- 18 -
Spectra
K0 III
Colors
Y
O
Zone 268
Deep Sky Objects
Easy
NGC 6522
Other Names: H I 49
Astronomical League Program: Herschel 400 Club
Rating: 3 E
Position: 1804-3002
Type: Gc
Dimensions: 2'
Class: 6
Magnitude: 10.5
Notes:
It was discovered by William Herschel in
1784 on the same night he found NGC 6528
(15' E).
The brightest stars are 13.7m and the
horizontal branch is 16.9m.
Observations:
C8 at 206x. Bright and large, it is mottled
at medium powers. A 9m star is 5 min N.
C11 at 98x. Large and semi-resolved.
Dense core. A brightish triangle of stars lies
on the NE side of the field. (Okie-Tex Star
Party, 2003)
Model (where the Sun is a baseball):
Its diameter would be 3,930 miles.
NGC 6522
Globular cluster
Observed with C11 on 9/25/03
Magnification: 98x
Okie-Tex Star Party
Distance (LY): 21,000
Luminosity (suns): 23,000
- 19 -
Zone 268
NGC 6624
Other Names: H I 50
Astronomical League Program: Herschel 400 Club
Rating: 3 E
Position: 1824-3022
Type: Gc
Dimensions: 3'
Class: 6
Magnitude: 8.6
Notes:
It was discovered by William Herschel in
June of 1784.
The brightest stars are 13.7m and the
horizontal branch is 16.1m.
It is an X-ray source and is dimmed 2.1
magnitudes by dust.
Observations:
C8 at 83x. Bright stellar core, but
unresolved.
C11 at 98x. Assymmetrical cluster with
an off-center nucleus. Semi-resolved and
with very dense core. (Okie-Tex Star Party,
2003)
Model (where the Sun is a baseball):
Its diameter would be 10,670 miles.
NGC 6624
Globular cluster
Observed with C11 on 9/25/03
Magnification: 98x
Okie-Tex Star Party
Distance (LY): 38,000
Luminosity (suns): 900,000
- 20 -
Zone 268
Moderate
NGC 6558
Other Names: Melotte 194
Rating: 4 M
Position: 1812-3146
Type: Gc
Magnitude: 11.0
Dimensions: 2'
Notes:
The horizontal branch is 16.7m.
J. Herschel discovered it in 1834.
A feature popularly known as the Parrot's Head lies 1.5o WNW of here, but is not
visible in an 8" scope.
Observations:
C8 at 83x. Unresolved. Beautiful field.
Model (where the Sun is a baseball):
Its diameter would be 5,620 miles.
Distance (LY): 30,000
Luminosity (suns): 16,000
NGC 6528
Other Names: H II 200
Astronomical League Program: Herschel 400 Club
Rating: 5 M
Position: 1805-3003
Type: Gc
Dimensions: 1'
Class: 5
Magnitude: 11.0
Notes:
It was discovered by William Herschel in 1784.
The brightest stars are 15.5m and the horizontal branch is 17.1m.
Absorption robs it of 4.2m.
- 21 -
Zone 268
Observations:
C8 at 83x. Faint and small, I could not resolve it. It lies a few minutes E of the
brighter globular NGC 6522 and an 11m star lies E of 6528.
Model (where the Sun is a baseball):
Its diameter would be 2,250 miles.
Distance (LY): 24,000
Luminosity (suns): 86,000
Difficult
NGC 6569
Other Names: H II 201
Astronomical League Program: Herschel 400 Club
Rating: 4 D
Position: 1814-3150
Type: Gc
Dimensions: 2'
Class: 8
Magnitude: 10.2
Notes:
The horizontal branch is 17.1m.
Absorption amounts to 3.3m in this area.
Observations:
C8 at 104x. A faint smudge, I could not resolve it. Very rich field.
Model (where the Sun is a baseball):
Its diameter would be 4,310 miles.
Distance (LY): 23,000
Luminosity (suns): 72,000
PK 2-9.1
Other Names: Canon 1-5
Rating: 4 D
Position: 1829-3130
Type: Pn
Magnitude: 11.9
- 22 -
Dimensions: <5''
Zone 268
Observations:
C8 at 280x. Small with a very faint disk
seen with averted vision.
C11 at 98x. Small diskette. Two 10m
stars lie just to the S. (Okie-Tex Star Party,
2003)
PK 2-9.1
Planetary nebula
Observed with C11 on 9/25/03
Magnification: 98x
Okie-Tex Star Party
Zone 268, Map 3
Reference Star
Eta Sgr (Arkab; Bur 760; HD 167618; SAO 209957)
Position: 1818-3646
Mag : 3.10 Spectrum : M2 III
Color : O
Assumed distance: 149 light years
Assumed luminosity (suns): 100
Notes:
This star is an infra-red source.
- 23 -
Zone 268
Double Stars
Easy
Howe 88
Rating: 4 E
HD 165063; SAO 209691
Position: 1806-3635
A
B
Magnitude
7.46
8.90
Separation PA
—
—
3.2 +
4+
Year
—
1991
Spectra
B4ne
Colors
W
pB
Notes:
1876: 1.3 @ 0. 15 measurements.
B has a 9.92m companion at 0.4 @ 22 (1991).
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.25 inches.
Separation: AB = 6.14 miles.
Distance (LY): 1,230
Total luminosity (Suns): 133
Bos 424
Rating: 4 E
HD 166905; SAO 209891
Position: 1814-3524
A
B
C
Magnitude
8.36
10.90
10.52
Separation
—
0.9 +
42.5 -
PA
—
82 +
143 +
Notes:
AB 1926: 0.7 @ 80. 3 measurements.
AC 1912: 42.6 @ 142. 4 measurements.
- 24 -
Year
—
1944
1991
Spectra
K2
Colors
Y
No
B
Zone 268
Observations:
C8 at 104x.
Innes 230
Rating: 5 E
HD 163958
Position: 1801-3742
A
B
C
Magnitude
8.61
10.27
9.93
Separation
—
6.6 +
62.6 -
PA
—
138 117 +
Year
—
1987
1958
Spectra
K0 IV
Colors
Y
W
W
Notes:
AB 1897: 5.0 @ 140. 12 measurements.
AC 1912: 75.5 @ 99. 6 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 422 feet; AC = 4,120 feet.
Distance (LY): 8
Total luminosity (Suns): 0.00284
Moderate
Harvard 283
Hough 88; HD 164870; SAO 209671
Rating: 5 M
Position: 1805-3553
A
B
Magnitude
5.98
10.62
Separation PA
—
—
12.5 +
290 +
Notes:
1891: 12.0 @ 275. 2 measurements.
- 25 -
Year
—
1900
Spectra
K2 III
Colors
yO
?
Zone 268
Observations:
C8 at 104x. Note the faint pair, 11m/12m, about 100" apart in pa 270.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 49.5 inches.
Separation: AB = 6.92 miles.
Distance (LY): 355
Total luminosity (Suns): 40.39
Bos 934
Rating: 5 M
HD 166833; SAO 209886
Position: 1814-3737
A
B
Magnitude
7.63
11.44
Separation PA
—
—
14.7
30
Year
—
1927
Notes:
1 measurement.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 18.8 miles.
Distance (LY): 820
Total luminosity (Suns): 51
- 26 -
Spectra
A0 V
Colors
W
W?
Zone 268
Zone 268, Map 4
Double Stars
Easy
Argelander 32
Rating: 3 E
ADS 11539; HD 172193; SAO 187106
Position: 1840-2530
A
B
C
D
Magnitude
7.45
9.10
8.82
11.27
Separation
—
7.1 53.3 -!
80.5 +
PA
—
219 +
285 =
218 -
Year
—
1991
1991
1901
Spectra
A0
A2
Colors
W
W
W
W
Notes:
AB 1862: 7.5 @ 213. 12 measurements. May be optical because Hipparcos gives
different distances (3,000 and 780 light years).
AC 1862: 68.7 @ 285. 8 measurements.
AD 1862: 79.0 @ 219. 2 measurements.
Observations:
C8 at 104x.
h5051
Doolittle 71 (D); ADS 11467; HD 171396; SAO 187022
Rating: 4 E
Position: 1836-2849
A
B
C
D
CD
Magnitude
9.19
10.50
10.89
12.20
Separation
—
10.0 +
92.4
5.3
PA
—
234 +
297
Year
—
1910
1907
33
1907
- 27 -
Spectra
G+A
Colors
W
rO
?
No
Zone 268
Notes:
AB 1834: 5.0 @ 231. 3 measurements.
AC and CD 1 measurement.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.8 inches.
Separation: AB = 7.27 miles; AC = 67.2 miles; CD = 3.85 miles.
Distance (LY): 466
Total luminosity (Suns): 5.63
Sigma Sgr
Rating: 5 E
34 Sgr; Nunki, "star of the proclamation of the sea"; Smyth 4; HD 175191; SAO
187448
Position: 1855-2618
A
B
Magnitude
2.02
9.50
Separation PA
—
—
309
244
Year
—
1837
Spectra
B3 V
Colors
bW
W
Notes:
1 measurement.
This star is a member of the Sco-Cen Association and rotates at 201 kps. It is also an
infra-red source.
From James Kaler's Star Notes:
It is a truly magnificent, brilliant star. With a surface temperature of 20,000 degrees
Kelvin, bluish Nunki is one of the hotter of the bright stars, and radiates much of its light
in the invisible ultraviolet. When we take that into account, the star is actually 3,300
times more luminous than our Sun. To receive the same heat, an "Earth" in the system
would have to orbit at a distance half again the size of the orbit of our Pluto. To be so
bright it must also be fairly large, and has a diameter about five times that of the Sun.
Typical of its breed, Nunki is a fast spinner, rotating with a speed of over 200
kilometers per second, 100 times that of our Sun. Like the Sun, however, it is a "normal"
unevolved star, and shines by the fusion of hydrogen into helium in its deep core. But its
mass is so high, seven or so times that of the Sun, and the internal fusion rates so fast,
that it cannot live very long, 50 million years at most. How far along its lifeline it is, we
do not know, but it cannot have too much left to it. The star will ultimately turn into a
- 28 -
Zone 268
white dwarf roughly as massive as the Sun. There is some indication that it has a close
companion.
Observations:
C8 at 104x. You'd never know it was a binary without a double star list.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.6 inches.
Separation: AB = 108 miles.
Distance (LY): 224
Total luminosity (Suns): 3,300
Moderate
See 356
Rating: 3 M
ADS 11553
Position: 1841-2953
A
B
Magnitude
9.17
9.34
Separation PA
—
—
3.7 132 -
Year
—
1991
Notes:
1897: 4.0 @ 134. 7 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 2,590 feet.
Distance (LY): 86
Total luminosity (Suns): 0.26
- 29 -
Spectra
B9 IV/V
Colors
W
W
Zone 268
Deep Sky Objects
Difficult
NGC 6644
Other Names: PK 8-7.2
Rating: 3 D
Position: 1833-2508
Type: Pn
Dimensions: 3''
Class: 2
Magnitude: 12.2
Notes:
This planetary was discovered by Edward
Pickering in 1880.
The central star is 15.9m.
Observations:
C8 at 280x. It was stellar at 104x, and
resembled an out-of-focus star at 280x. Very
bright center.
C11 at 339x. Faint and small object some 3
min E of a 9m star. (Okie-Tex Star Party, 2003)
Distance (LY): 9,000
Total luminosity (Suns): 84
NGC 6644
Planetary nebula (2)
Observed with C11 on 9/25/03
Magnification: 339x
Okie-Tex Star Party
- 30 -
Zone 268
NGC 6638
Other Names: H I 51
Astronomical League Program: Herschel 400 Club
Rating: 4 D
Position: 1831-2530
Type: Gc
Dimensions: 2'
Class: 6
Magnitude: 9.2
Notes:
The brightest stars are 15.0m and the horizontal branch is 15.9m.
Absorption is 2.0m.
Observations:
C8 at 83x. Small and unresolved, it has a bluish tint. Use high power. A faint (but
wide) pair is 5 min SW.
C11 at 98x. Class: 6. Small and not resolved.
Model (where the Sun is a baseball):
Its diameter would be 8,800 miles.
Distance (LY): 47,000
Luminosity (suns): 230,000
- 31 -
Zone 268
Zone 268, Map 5
Double Stars
Easy
Glasenapp 15
Rating: 4 E
HD 175478; SAO 210749
Position: 1857-3320
A
B
Magnitude
7.16
8.78
Separation PA
—
—
49.1 10 +
Year
—
1984
Spectra
B9 V
Colors
W
O
Notes:
1890: 50.0 @ 9. 8 measurements.
Hipparcos/Tycho mission data show different distances for these stars (680 and 3,260
light years); they may be optical. The stars also have different proper motions.
Observations:
C8 at 104x.
Perth Obs 206
Rating: 5 E
HD 171136; SAO 210322
Position: 1835-3109
A
B
Magnitude
9.01
11.76
Separation PA
—
—
14.6
160
Notes:
1 measurement.
Observations:
C8 at 104x.
- 32 -
Year
—
1910
Spectra
A0 V
Colors
Y
O?
Zone 268
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 3.59 miles.
Distance (LY): 158
Total luminosity (Suns): 0.54
Moderate
Stone 62
Rating: 5 M
HD 171119; SAO 210321
Position: 1835-3449
A
B
Magnitude
7.59
7.86
Separation PA
—
—
2.2 +
133 -
Year
—
1991
Notes:
1876: 1.8 @ 140. 32 measurements.
Observations:
C8 at 280x. Elongated.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches.
Separation: AB = 1.00 mile.
Distance (LY): 282
Total luminosity (Suns): 15.2
- 33 -
Spectra
F0 V
Colors
Y
O
Zone 268
Deep Sky Objects
Easy
NGC 6637
Rating: 3 E
Other Names: M69
Astronomical Leage Program: Messier Club, Messier Binocular Club
Position: 1831-3221
Type: Gc
Dimensions: 4'
Class: 5
Magnitude: 7.5
Notes:
It was discovered by Lacaille in 1752;
Messier cataloged it on August 31, 1780.
It is 70 light years in diameter. The
brightest stars are 13.2m and the horizontal
branch is 16.2m.
The spectroscope reveals an abundance
of heavy metals.
Absorption is 2.9m.
Observations:
C8 at 206x. Large and asymmetric, it
was only semi-resolved and has irregular
edges.
C11 at 98x. Semi-resolved, it appears
cut off on the S side. A 9m star lies to the
NE. (Okie-Tex Star Party, 2003)
14x70 Binos. Small but bright knot of
fuzz.
NGC 6637 (M69)
Globular cluster
Observed with C11 on 9/25/03
Magnification: 98x
Okie-Tex Star Party
Model (where the Sun is a baseball):
Its diameter would be 13,480 miles.
Distance (LY): 36,000
Luminosity (suns): 1,100,000
- 34 -
Zone 268
NGC 6652
Position: 1836-3259
Type: Gc
Dimensions: 2'
Rating: 3 E
Class: 6
Magnitude: 8.7
Notes:
The horizontal branch is 16.7m.
Absorption amounts to 1.8m.
Observations:
C8 at 104x. Large, bright and
unresolved.
C11 at 98x. Small and semi-resolved
knot. (Okie-Tex Star Party, 2003)
Model (where the Sun is a baseball):
Its diameter would be 9,740 miles.
Distance (LY): 52,000
Luminosity (suns): 370,000
NGC 6652
Globular cluster
Observed with C11 on 9/25/03
Magnification: 98x
Okie-Tex Star Party
NGC 6681
Rating: 4 E
Other Names: M70
Astronomical Leage Program: Messier Club, Messier Binocular Club
Position: 1843-3218
Type: Gc
Dimensions: 4'
Class: 5
Magnitude: 8.0
Notes:
Messier listed it in his catalog on August 31, 1780.
It is 80 light years in diameter. The brightest stars are 14.0m and the horizontal
branch is 15.6m.
- 35 -
Zone 268
Observations:
C8 at 83x. Bright, compact, and not resolved. It takes high power well, and brightens
rapidly as you approach the center. A chain of stars extends to the NE.
14 x 70 Binos. Small and moderately bright splotch.
Model (where the Sun is a baseball):
Its diameter would be 12,730 miles.
Distance (LY): 65,000
Luminosity (suns): 330,000
Moderate
NGC 6715
Rating: 4 M
Other Names: M54
Astronomical Leage Program: Messier Club, Messier Binocular Club
Position: 1855-3029
Type: Gc
Dimensions: 6'
Class: 3
Magnitude: 9.0
Notes:
Messier found it on July 24, 1778.
It is 70 light years in diameter. The brightest stars are 15.5m and the horizontal
branch is 17.7m.
Absorption is 1.4m.
Observations:
C8 at 65x. Unresolved, it looks a little like a planetary nebula. Use high powers. A
9m star lies off the N edge.
14x70 Binos. Small and rather dim.
Model (where the Sun is a baseball):
Its diameter would be 38,200 miles.
Distance (LY): 68,000
Luminosity (suns): 330,000
- 36 -
Zone 268
Zone 268, Map 6
Double Stars
Easy
Kappa CrA
Dunlop 222; HD 170867; SAO 210295
Rating: 3 E
Position: 1833-3843
A
B
Magnitude
5.67
6.31
Separation PA
—
—
21.4 358 -
Year
—
1991
Spectra
B9.5 V
A0 III
Colors
W
R
Notes:
1836: 30.0 @ 0. 35 measurements.
May be optical.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.60 inches; B = 19.2 inches.
Separation: AB = 57.4 miles.
Distance (LY): 1,720
Total luminosity (Suns): 1910
Lambda CrA
Cordoba 227; 11 CrA; HD 172777; SAO 210501
Rating: 4 E
Position: 1844-3819
A
B
Magnitude
5.11
10.01
Separation PA
—
—
29.2 +
214 -
Notes:
1894: 25.0 @ 215. 14 measurements.
- 37 -
Year
—
1981
Spectra
A0 V
Colors
yW
W
Zone 268
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 9.20 miles.
Distance (LY): 202
Total luminosity (Suns): 29.3
- 38 -
Zone 268
Zone 268 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
Holden 32
1803-2705
3E
1
h5012
1806-3437
3E
2
USNO 21
1809-2528
3E
1
h5036
1818-3406
3E
2
USNO 6
1829-2635
3E
1
Kappa CrA
1833-3843
3E
6
Argelander 32
1840-2530
3E
4
Howe 88
1806-3635
4E
3
Cordoba 223
1806-3418
4E
2
Bos 424
1814-3524
4E
3
h5037
1816-3110
4E
2
Bur 285
1817-2500
4E
1
Bos 387
1819-2644
4E
1
Rousseau 31
1824-2936
4E
1
h5051
1836-2849
4E
4
Lambda CrA
1844-3819
4E
6
Glasenapp 15
1857-3320
4E
5
Component
A
B
C
A
B
A
B
A
B
C
D
CD
A
B
A
B
A
B
C
D
A
B
A
B
C
BC
A
B
C
A
B
A
B
A
B
C
D
A
B
A
B
C
D
CD
A
B
A
B
- 39 -
Mag
8.35
9.40
11.50
8.59
9.13
6.76
8.70
6.03
9.47
8.67
10.20
6.68
8.10
5.67
6.31
7.45
9.10
8.82
11.27
7.46
8.90
7.99
9.94
11.30
8.36
10.90
10.52
7.66
10.09
9.02
9.77
8.55
9.88
10.73
14.00
8.05
8.58
9.19
10.50
10.89
12.20
5.11
10.01
7.16
8.78
Separation
—
5.2 +
43.3
—
23.3 —
13.5 =
—
39.0 +
94.1 =
PA
—
101 43.3
—
189 —
65 —
86 94.1 =
16.5
—
41.9 +
—
21.4 —
7.1 53.3 -!
80.5 +
—
3.2 +
—
27.0
347
—
182 —
358 —
219 +
53.3 -!
80.5 +
—
4+
—
244
26.7
—
0.9 +
42.5 —
37.4 +
—
59.7 —
8.8 0.7 =
4.2
—
46.0 —
10.0 +
92.4
247
—
82 +
42.5 —
227 +
—
141 +
—
37 +
0.7 =
4.2
—
176 —
234 +
92.4
5.3
—
29.2 +
—
49.1 -
33
—
214 —
10 +
Zone 268
Designation
Position
Rating
Map
Innes 230
1801-3742
5E
3
Stone 38
1802-2741
5E
1
Harvard 148
1804-2529
5E
1
Olivier 17
1820-3500
5E
2
Cordoba 225
1826-2725
5E
1
Bos 2865
1826-2749
5E
1
Perth Obs 206
1835-3109
5E
5
Sigma Sgr
1855-2618
5E
4
H N 125
1829-2503
2M
1
Stone 40
1802-2731
3M
1
Bur 244
1809-2752
3M
1
See 356
1841-2953
3M
4
Bur 245
1810-3044
4M
2
Harvard 283
1805-3553
5M
3
Bos 934
1814-3737
5M
3
Stone 62
1835-3449
5M
5
Bur 133
1828-2638
5D
1
Component
A
B
C
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
A
B
- 40 -
Mag
8.61
10.27
9.93
8.20
9.40
10.02
10.11
10.27
12.00
9.19
9.40
9.40
9.82
11.90
9.01
11.76
2.02
9.50
7.40
8.30
8.49
9.31
7.23
9.18
9.17
9.34
5.53
7.71
5.98
10.62
7.63
11.44
7.59
7.86
6.31
7.17
Separation
—
6.6 +
62.6 —
6.4 —
4.6 —
6.0 +
—
5.9 53.1
—
11.3
—
14.6
—
309
—
2.6 —
3.0 =
—
2.2 +
—
3.7 —
3.9 —
12.5 +
—
14.7
—
2.2 +
—
0.9 -
PA
—
138 62.6 —
84 —
17 +
—
252 +
—
359 +
53.1
—
296
—
160
—
244
—
105 =
—
162 —
265 +
—
132 —
353 —
290 +
—
30
—
133 —
243 -
Zone 268
Deep Space Objects
Object
NGC 6522
NGC 6624
NGC 6637
NGC 6652
NGC 6681
NGC 6520
NGC 6540
NGC 6544
NGC 6553
NGC 6558
NGC 6715
Barnard 86
NGC 6528
NGC 6644
NGC 6569
PK 2-9.1
NGC 6638
Position
1804-3002
1824-3022
1831-3221
1836-3259
1843-3218
1803-2754
1806-2749
1807-2500
1809-2554
1812-3146
1855-3029
1803-2750
1805-3003
1833-2508
1814-3150
1829-3130
1831-2530
Rating
3E
3E
3E
3E
4E
2M
4M
4M
4M
4M
4M
5M
5M
3D
4D
4D
4D
Map
2
2
5
5
5
1
1
1
1
2
5
1
2
4
2
2
4
Type
Gc (6)
Gc (6)
Gc (5)
Gc (6)
Gc (5)
Oc (I 2rn)
Oc (I 1pn)
Gc
Gc (11)
Gc
Gc (3)
Dn
Gc (5)
Pn (2)
Gc (8)
Pn
Gc (6)
- 41 -
Specifications
Surface
Mag
Br
10.5
8.6
7.5
8.7
8.0
9.0
11.0
9.0
10.0
11.0
9.0
—
11.0
12.2
10.2
11.9
9.2
Population
60
12