18187-1837 BU 639 AB
18h 18m 43.26s -18° 37' 10.8" P.A. 136.00 sep 0.5 mag 7.20,8.20 Sp B0Ib
Coord 2000 |
18187-1837 |
|
Discov num |
BU 639 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 18 43.26 -18 37 10.8 |
|
Date first |
1878 |
|
Date last |
2017 |
|
Obs |
32 |
|
Pa first |
155 |
|
Pa last |
136 |
|
P.A. Now (θ) |
136° |
|
Sep first |
0.6 |
|
Sep last |
0.467 |
|
Sep. Now (ρ) |
0.467" |
|
Mag pri |
7.20 |
|
Mag sec |
8.20 |
|
delta mag (ΔM) |
1 |
|
Spectral class |
B0Ib (blue-white) |
|
Pri motion ra |
+004 |
|
Sec motion ra |
|
|
Pri motion dec |
-004 |
|
Sec motion dec |
|
|
Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
18187-1837 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
161304 |
18 18 43 -18 37 11 |
BU 639 AB |
2017 |
32 |
136 |
0.5 |
7.20 |
8.20 |
1.00 |
|
<=== |
Show |
NSV10543 |
161304 |
18 18 43 -18 37 11 |
SHJ 264 AB,C |
2019 |
59 |
50 |
17.2 |
6.86 |
7.63 |
0.77 |
|
|
Show |
|
161304 |
18 18 43 -18 37 11 |
FOX 225 AB,E |
2000 |
7 |
328 |
145.6 |
6.86 |
10.78 |
3.92 |
|
|
Show |
|
|
18 18 44 -18 36 60 |
BU 300 CD |
2015 |
10 |
329 |
6.3 |
7.63 |
13.10 |
5.47 |
|
|
Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Var name |
NSV10543 |
|
Constellation |
Sagittarius |
|
SAO |
161304 |
|
Tycho2 |
6269-04010-1 |
|
Gaia DR2 |
4096324302654797952 |
|
HD |
168021 |
|
HR |
6848 |
|
GC |
24978 |
|
ADS |
11240 |
|