Zone 218, Master Map
-04°00'
Normal View
Zone Master, Normal View, 10 deg FOV
c
e
Scorpius
-10°00'
υ
Octans
-08°00'
-06°00'
ε Yed Posterior
ψ
ζ
-12°00'
ξ
χ
d
-14°00'
f
17h 04m
16h 56m
16h 48m
16h 40m
16h 32m
16h 24m
16h 16m
16h 08m
16h 00m
Zone 218, Map 1
Normal Image
-06°00'
-05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-07°00'
STF 2005
Bur 623
-08°00'
STF 2018 rej
Octans
STF 2048
STF 2012 rej
υ
-09°00'
Scorpius
ψ
16h 30m
16h 25m
16h 20m
16h 15m
16h 10m
16h 05m
16h 00m
Zone 218, Map 1
Mirror Image
-06°00'
-05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-07°00'
STF 2005
Bur 623
Octans
-08°00'
STF 2018 rej
STF 2048
STF 2012 rej
υ
-09°00'
Scorpius
ψ
16h 00m
16h 05m
16h 10m
16h 15m
16h 20m
16h 25m
16h 30m
Zone 218, Map 2
Normal Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
ψ
-11°00'
STF 2019 rej
Xi Sco
ξ
STF 1999
-12°00'
χ
Roe 37
-14°00'
-13°00'
11 Sco
Rossiter 3934
16h 30m
16h 25m
16h 20m
16h 15m
16h 10m
16h 05m
16h 00m
Zone 218, Map 2
Mirror Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
ψ
-11°00'
STF 2019 rej
Xi Sco ξ
STF 1999
-12°00'
χ
Roe 37
-14°00'
-13°00'
11 Sco
Rossiter 3934
16h 00m
16h 05m
16h 10m
16h 15m
16h 20m
16h 25m
16h 30m
Zone 218, Map 3
Normal Image
-05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-08°00'
-07°00'
-06°00'
STF 3106
-09°00'
LDS 573
17h 00m
16h 55m
16h 50m
16h 45m
16h 40m
16h 35m
16h 30m
Zone 218, Map 3
Mirror Image
-05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-08°00'
-07°00'
-06°00'
STF 3106
STF 2048
-09°00'
LDS 573
16h 30m
16h 35m
16h 40m
16h 45m
16h 50m
16h 55m
17h 00m
Zone 218, Map 4
Normal Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Zeta Oph
Hough 407
-11°00'
ζ
Doolittle 63
-13°00'
-12°00'
Hussey 159
NGC 6171
Holden 27
-14°00'
STF 2050
STF 3104
17h 00m
16h 55m
16h 50m
16h 45m
16h 40m
16h 35m
16h 30m
Zone 218, Map 4
Mirror Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-11°00'
Hough 407 ζ
Zeta Oph
-13°00'
-12°00'
Hussey 159
-14°00'
NGC 6171
STF 2050
STF 3104
16h 30m
16h 35m
16h 40m
16h 45m
16h 50m
16h 55m
17h 00m
Zone 218
1 Reference Star, 18 Double Stars, 1 Globular Cluster
Flamsteed
Rossiter 3934 .............................................. 6
11 Sco.......................................................... 7
S
B
STF 1999..................................................... 5
STF 2005..................................................... 4
STF 2012 rej ............................................... 3
STF 2018 rej ............................................... 2
STF 2019 rej ............................................... 6
STF 2048..................................................... 2
STF 2050................................................... 11
STF 3104................................................... 10
STF 3106..................................................... 9
Bur 623........................................................ 3
H
Holden 27.................................................. 12
Hough 407................................................. 13
Hussey 159................................................ 12
L
LDS 573 ...................................................... 9
X
N
Xi Sco.......................................................... 8
NGC 6171 ................................................. 13
Z
R
Zeta Oph.................................................... 10
Roe 37 ......................................................... 7
-1-
Zone 218
Zone 218, Map 1
Double Stars
Easy
STF 2048
Rating: 3 E
ADS 10072; HD 148515; SAO 141195
Position: 1629-0808
A
B
C
Magnitude
6.49
9.71
11.80
Separation
—
5.5 +
131.9 -
PA
—
298 301 +
Year
—
1991
1960
Spectra
F2 V
Colors
W
dO
?
Notes:
AB 1831: 4.7 @ 303. 43 measurements. Star A is a spectroscopic binary as is B.
The stars share common proper motion.
AC 1910: 132.0 @ 299. 3 measurements.
Observations:
C8 at 280x. Webb saw them as yW and ?. Smyth points out a dO!! star in the field,
which I failed to notice.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.10 inches.
Separation: AB = 1.29 miles; AC = 31.1 miles.
Distance (LY): 151
Total luminosity (Suns): 4.9336
STF 2018 rej
Rating: 4 E
HD 145915; SAO 141042
Position: 1614-0739
A
B
Magnitude
9.25
10.88
Separation PA
—
—
19.4 355 -
-2-
Year
—
1991
Spectra
A0
Colors
W
W
Zone 218
Notes:
1848: 21.0 @ 356. 6 measurements. May be optical because Hipparcos gives
different distances (1,760 and 199 light years).
Observations:
C11 at 98x.
STF 2012 rej
Rating: 5 E
HD 145207; SAO 141002
Position: 1610-0815
A
B
Magnitude
8.70
11.80
Separation PA
—
—
23.2 +
219 -
Year
—
1986
Spectra
F5
Colors
W
?
Notes:
1879: 22.7 @ 243. 6 measurements.
Observations:
C8 at 104x. It lies between two bright stars (7.6m SAO 140990 to the W and 7.8m
141014 to the E).
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.6 inches.
Separation: AB = 8.32 miles.
Distance (LY): 230
Total luminosity (Suns): 1.5
Difficult
Bur 623
Rating: 2 D
ADS 9881; HD 143554
Position: 1602-0658
A
B
Magnitude
8.96
9.39
Separation PA
—
—
0.9 235 -3-
Year
—
1995
Spectra
F5
Colors
W
W
Zone 218
Notes:
1878: 1.0 @ 238. 29 measurements.
Observations:
C11 at 634x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.8 inches.
Separation: AB = 686 feet.
Distance (LY): 95
Total luminosity (Suns): 0.303
STF 2005
Bur 948 (B); ADS 9918; HD 144362; SAO 140945
Rating: 4 D
Position: 1606-0617
A
B
C
D
Magnitude
6.53
8.96
11.31
11.87
Separation
—
0.9 28.9 +
52.6 +
PA
—
99 232 195 +
Year
—
1994
1958
1924
Spectra
F2 IV
Colors
W
?
?
?
Notes:
AB 1879: 1.5 @ 151. 53 measurements. Star A is a spectroscopic binary exchanging
mass with its companion. It has a period of 4.9 years with semi-major axis of 0.066" and
retrograde motion, and has been resolved by inteferometry. (It is cataloged as Fom 394.)
AC 1879: 28.5 @ 234. 12 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical.
AD 1879: 52.3 @ 193. 6 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.10 inches.
Separation: AB = 1,848 feet; AC = 11.5 miles; AD = 20.9 miles.
Distance (LY): 255
Total luminosity (Suns): 15.1
-4-
Zone 218
Zone 218, Map 2
Double Stars
Easy
STF 1999
Rating: 3 E
ADS 9910; HD 144087; SAO 159668
Astronomical League Program: Double Star Club
Position: 1604-1127
A
B
C
D
Magnitude
7.44
8.02
6.00
7.44
Separation
—
11.8 +
76.7 +
280.1 -
PA
—
99 83 +
167 -
Year
—
1996
1979
1991
Spectra
G8 V
K2 V
Colors
Y
Y
W
W
Notes:
AB 1823: 9.0 @ 102. Over 100 measurements. The stars share common proper
motion.
AC 1903: 75.1 @ 81. 6 measurements.
AD 1866: 280.8 @ 169. 13 measurements.
Observations:
C8 at 166x (Microguide). Made 6 pairs of measures. 12.1" @ 97.3. Webb saw them
as W and Y.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.85 inches; B = 26.9 inches.
Separation: AB = 1.71 miles; AC = 11.1 miles; AD = 40.7 miles.
Distance (LY): 93
Total luminosity (Suns): 1.17
-5-
Zone 218
STF 2019 rej
Rating: 3 E
ADS 9971; HD 145996; SAO 159803
Position: 1614-1025
A
B
Magnitude
7.30
9.70
Separation PA
—
—
22.6 155 =?
Year
—
1991
Spectra
F8 V
Colors
W
V?
Notes:
1848: 21.7 @ 335. 8 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical. Quadrant reversal?
Observations:
C8 at 83x. Star B looks fainter than 9.5 (perhaps due to its color?).
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches.
Separation: AB = 9.41 miles.
Distance (LY): 267
Total luminosity (Suns): 7.1
Rossiter 3934
Rating: 4 E
HD 145608; SAO 159775
Position: 1612-1359
A
B
Magnitude
10.32
10.72
Separation PA
—
—
30.1 179 +
Year
—
1991
Notes:
1905: 31.1 @ 176. 6 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 27.6 inches.
Separation: AB = 8.97 miles.
Distance (LY): 191
Total luminosity (Suns): 0.5
-6-
Spectra
K0
Colors
O
bW
Zone 218
Roe 37
Position: 1618-1226
A
B
Magnitude
9.92
10.90
Rating: 4 E
Separation PA
—
—
8.3 251 +
Year
—
1987
Spectra
G5 V
Colors
Y
rO
Notes:
1910: 11.0 @ 232. 2 measurements.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches.
Separation: AB = 2,587 feet.
Distance (LY): 38
Total luminosity (Suns): 0.017
Moderate
11 Sco
Bur 39; ADS 9924; HD 144708; SAO 159715
Rating: 4 M
Position: 1608-1245
A
B
Magnitude
5.75
9.74
Separation PA
—
—
3.4 259 +
Year
—
1991
Spectra
A0 V
Colors
W
?
Notes:
1872: 3.3 @ 257. 24 measurements.
Star A is a spectroscopic binary and rotates at 239 kps.
Observations:
C8 at 280x. It lies at the NW end of an interesting bowl of 7m-9m stars. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 2.26 miles.
Distance (LY): 426
Total luminosity (Suns): 85
-7-
Zone 218
Difficult
Xi Sco
Abetti; STF 1998; ADS 9909; HD 144069; SAO 159665
Astronomical League Program: Double Star Club
Rating: 1 D
Position: 1604-1122
A
B
C
Magnitude
4.20
5.10
7.20
Separation
—
0.2 -!
8.1 +
PA
—
35 +!
42 -!
Year
—
1997
1997
Spectra
F5 V
F5 IV
Colors
Y
dO
yW
Notes:
It was discovered in 1782 by William Herschel.
AB 1825: 1.2 @ 356. Over 100 measurements. The orbit takes 45.69 years (Baize,
1942), with a semi-major axis of 0.76" and direct motion. The primary is 1.45 times the
sun's mass and the companion 1.34 times. They are at least 18 AU apart (the size of the
orbit of Uranus).
Star A is a spectroscopic binary.
AC 1823: 6.9 @ 81. Over 100 measurements. The AC orbit probably takes over
1,000 years.
STF 1999 is 40' S and is actually a part of this system, being at least 7,000 AU from
Xi.
Observations:
C8 at 206x. Some report both (A, C) as W. Split obtained in 1989 before the
separation closed.
C8 at 280x. yW and bW.
William Schaart (Killeen, TX; 6" Dob) saw them (A, C) as Y and pB.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches; B = 10.400 inches.
Separation: AB = 599 feet; AC = 1.21 miles.
Distance (LY): 96
Total luminosity (Suns): 22.77
-8-
Zone 218
Zone 218, Map 3
Double Stars
Moderate
LDS 573
Wolf 630; V1054 Oph; Kuiper 75 (B); HD 152751; SAO 141439
Rating: 5 M
Position: 1656-0820
A
B
Magnitude
9.02
11.73
Separation PA
—
—
75.8 +
314 -
Year
—
1996
Spectra
M3 Ve
Colors
dY
W?
Notes:
1922: 72.1 @ 315. 8 measurements.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 1.05 inches.
Separation: AB = 2.36 miles.
Distance (LY): 20
Total luminosity (Suns): 0.016
Difficult
STF 3106
Rating: 4 D
ADS 10260; SAO 141441
Position: 1656-0506
A
B
Magnitude
9.54
9.55
Separation PA
—
—
1.9 75 +
-9-
Year
—
1999
Spectra
G0
Colors
W
W
Zone 218
Notes:
1831: 2.4 @ 67. 61 measurements.
Observations:
C8 at 206x.
Zone 218, Map 4
Reference Star
Zeta Oph (13 Oph; HD 149757; SAO 160006)
Position: 1637-1034
Mag : 2.50
Spectrum : O9.5 V
Color : bW
Assumed distance: 458 light years
Assumed luminosity (suns): 1,700
Notes:
This star is a runaway from the Sco OB2 Association and is a shell star. A supernova
remnant nearby may be the kick that ejected it from the OB2 Association.
Its diameter is 0.00050 arc seconds.
It is an infra-red source and a shell star.
Double Stars
Easy
STF 3104
Rating: 4 E
ADS 10083; HD 148700; SAO 159956
Position: 1631-1433
A
B
C
Magnitude
8.72
9.78
9.80
Separation
—
9.5 +
108.8 +
PA
—
229 +
79 +
Notes:
AB 1832: 9.0 @ 226. 12 measurements.
- 10 -
Year
—
1991
1912
Spectra
G0 V
Colors
Y
W
W
Zone 218
AC 1890: 107.6 @ 78. 3 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.45 inches.
Separation: AB = 3.67 miles; AC = 42.1 miles.
Distance (LY): 248
Total luminosity (Suns): 2.6
STF 2050
Rating: 4 E
ADS 10084; HD 148759; SAO 159961
Position: 1631-1308
A
B
C
Magnitude
8.30
10.20
9.32
Separation
—
5.7 +
139.5 +
PA
—
218 +
296 -
Year
—
1990
1991
Spectra
A0 IV/V
Notes:
AB 1831: 5.4 @ 217. 14 measurements.
AC 1890: 137.9 @ 300. 8 measurements.
Observations:
C8 at 104x. It lies 30 min W of the globular cluster NGC 6171 (M107).
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 2.13 miles; AC = 52.2 miles.
Distance (LY): 240
Total luminosity (Suns): 2.8
- 11 -
Colors
W
rO
W
Zone 218
Hussey 159
Rating: 4 E
ADS 10254
Position: 1655-1133
A
B
Magnitude
9.54
10.26
Separation PA
—
—
4.2 151 -
Year
—
1991
Spectra
G0
Colors
W
W
Notes:
1900: 4.3 @ 152. 19 measurements.
Observations:
C11 at 98x.
Holden 27
Rating: 5 E
ADS 10286
Position: 1659-1312
A
B
Magnitude
8.94
9.40
Separation PA
—
—
4.9 =
135 =
Year
—
1991
Notes:
1881: 4.9 @ 135. 17 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches.
Separation: AB = 6.19 miles.
Distance (LY): 810
Total luminosity (Suns): 19
- 12 -
Spectra
F5 V
Colors
W
O
Zone 218
Moderate
Hough 407
Rating: 5 M
ADS 10104; HD 149108; SAO 159972
Position: 1633-1033
A
B
Magnitude
6.84
11.80
Separation PA
—
—
14.5 +
216 -
Year
—
1910
Spectra
A5 V
Colors
W
?
Notes:
1890: 14.0 @ 218. 4 measurements.
Observations:
C8 at 104x. It forms the W vertex of a 7m triangle.
Nice field to the E.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.50 inches.
Separation: AB = 6.81 miles.
Distance (LY): 301
Total luminosity (Suns): 14.13
Deep Sky Objects
Moderate
NGC 6171
Rating: 4 M
Other Names: M107, H VI 40
Astronomical Leage Program: Messier Club, Herschel 400 Club, Messier Binocular
Club
Position: 1633-1303
Type: Gc
Dimensions: 4'
Class: 10
Magnitude: 9.0
- 13 -
Zone 218
Notes:
M107 is another additional object found by Pierre Méchain in April, 1782. Herewith,
it is probably the Messier object which was the latest to be discovered. Eventually, Helen
Sawyer Hogg added it to the Messier Catalog in 1947, together with M105 and M106,
although it appears probable that already Méchain had intended to add it to a future
edition of Charles Messier's list. William Herschel, who had independently discovered it
on May 12, 1793, cataloged this object as H VI.40; Herschel was the first observer to
resolve this globular cluster into stars.
M107 apparently contains some dark
obscured regions, which is unusual for
globular clusters. The star distribution is
called "very open" by Kenneth Glyn Jones,
who points out that this cluster "enables
the interstellar regions to be examined
more easily, and globular clusters are
important `laboratories' in which to study
the process by which galaxies evolve."
Visually, M107 is about 3 minutes of
arc across, while in photos it extends over
a region more than 4 times this diameter
(about 13'). M107 is approaching us at 147
km/sec, contains about 25 known
variables, and as a globular cluster, is of
intermediate metallicity (abundances of
elements heavier than Helium).
NGC 6171
Globular cluster
Observed with C8 on 7/26/03
Magnification: 80x
ASKC Star Party, Louisburg Lake
[Source: http://www.seds.org/Messier
/m/m107.html]
Observations:
C8 at 65x. Unresolved, but mottled. It
is framed by a triangle of very faint stars.
Very rich and compressed.
C11 at 98x. Class 11. Very loose and scattered group, semi-resolved, but without
much of a center. Several bright stars lie about 30min N.
14x70 Binos. Framed nicely by a NE/SW narrow rectangle. Very bright middle with
a small fuzzy halo.
Model (where the Sun is a baseball):
Its diameter would be 8,240 miles.
Distance (LY): 22,000
Radial velocity (km/sec): -147
Luminosity (suns): 9,900
- 14 -
Zone 218
Zone 218 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 1999
1604-1127
3E
2
STF 2019 rej
1614-1025
3E
2
STF 2048
1629-0808
3E
1
Rossiter 3934
1612-1359
4E
2
STF 2018 rej
1614-0739
4E
1
Roe 37
1618-1226
4E
2
STF 2050
1631-1308
4E
4
STF 3104
1631-1433
4E
4
Hussey 159
1655-1133
4E
4
STF 2012 rej
1610-0815
5E
1
Holden 27
1659-1312
5E
4
11 Sco
1608-1245
4M
2
Hough 407
1633-1033
5M
4
LDS 573
1656-0820
5M
3
Xi Sco
1604-1122
1D
2
Bur 623
1602-0658
2D
1
STF 2005
1606-0617
4D
1
STF 3106
1656-0506
4D
3
Component
A
B
C
D
A
B
A
B
C
A
B
A
B
A
B
A
B
C
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
C
D
A
B
- 15 -
Mag
7.44
8.02
6.00
7.44
7.30
9.70
6.49
9.71
11.80
10.32
10.72
9.25
10.88
9.92
10.90
8.30
10.20
9.32
8.72
9.78
9.80
9.54
10.26
8.70
11.80
8.94
9.40
5.75
9.74
6.84
11.80
9.02
11.73
4.20
5.10
7.20
8.96
9.39
6.53
8.96
11.31
11.87
9.54
9.55
Separation
—
11.8 +
76.7 +
280.1 —
22.6 —
5.5 +
131.9 —
30.1 —
19.4 —
8.3 —
5.7 +
139.5 +
—
9.5 +
108.8 +
—
4.2 —
23.2 +
—
4.9 =
—
3.4 —
14.5 +
—
75.8 +
—
0.2 -!
8.1 +
—
0.9 —
0.9 28.9 +
52.6 +
—
1.9 -
PA
—
99 76.7 +
280.1 —
155 =?
—
298 131.9 —
179 +
—
355 —
251 +
—
218 +
139.5 +
—
229 +
108.8 +
—
151 —
219 —
135 =
—
259 +
—
216 —
314 —
35 +!
8.1 +
—
235 —
99 28.9 +
52.6 +
—
75 +
Zone 218
Deep Space Objects
Object
NGC 6171
Position
1633-1303
Rating
4M
Map
4
Type
Gc (10)
- 16 -
Specifications
Surface
Mag
Br
9.0
Population