18381-1400 BU 135 AB (HD 171957)
18h 38m 04.48s -14° 00' 17.1" P.A. 189.00 sep 2.5 mag 6.58,10.60 Sp B9IV dist. 246.91 pc (805.42 l.y.)
| Coord 2000 |
18381-1400 |
|
Discov num |
BU 135 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 38 04.48 -14 00 17.1 |
|
| Date first |
1873 |
|
Date last |
2015 |
|
Obs |
14 |
|
| Pa first |
210 |
|
Pa last |
188.5 |
|
P.A. Now (θ) |
188.5° |
|
| Sep first |
2.0 |
|
Sep last |
2.517 |
|
Sep. Now (ρ) |
2.517" |
|
| Mag pri |
6.58 |
|
Mag sec |
10.60 |
|
delta mag (ΔM) |
4.02 |
|
Spectral class |
B9IV (blue-white) |
|
| Pri motion ra |
-001 |
|
Sec motion ra |
|
|
| Pri motion dec |
-006 |
|
Sec motion dec |
|
|
| Notes |
S
(Parallax indidates non-physical) |
|
This double is not physical.
18381-1400 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 171957 |
161687 |
18 38 04 -14 00 17 |
BU 135 AB |
2015 |
14 |
189 |
2.5 |
6.58 |
10.60 |
4.02 |
|
<=== |
| Show |
|
161687 |
18 38 04 -14 00 17 |
BU 135 AC |
2015 |
3 |
78 |
15.0 |
6.58 |
14.90 |
8.32 |
|
|
| Show |
|
161687 |
18 38 04 -14 00 17 |
SLE 218 AD |
2015 |
9 |
338 |
120.7 |
6.58 |
10.70 |
4.12 |
|
|
| Show |
|
161687 |
18 38 04 -14 00 17 |
SLE 218 AE |
2015 |
7 |
108 |
118.7 |
6.58 |
11.60 |
5.02 |
|
|
| Show |
|
161687 |
18 38 04 -14 00 17 |
B 2911 AF |
2015 |
4 |
56 |
36.3 |
6.58 |
14.00 |
7.42 |
|
|
| Show |
|
161687 |
18 38 04 -14 00 17 |
B 2911 AG |
2015 |
4 |
74 |
39.8 |
6.58 |
13.20 |
6.62 |
|
|
Septuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 171957 |
|
Constellation |
Scutum |
|
SAO |
161687 |
|
HIP |
91369 |
|
| Tycho2 |
5703-02958-1 |
|
Gaia DR2 |
4103838472556224128 |
|
HD |
171957 |
|
HR |
6989 |
|
| GC |
25465 |
|
ADS |
11512 |
|
BD |
BD-14 5139 |
|
Distance |
246.91 |
|
| Distance ly |
805.42 |
|
