18081+0213 BU 636 AB (HD 165887)
18h 08m 07.24s +02° 13' 07.2" P.A. 120.00 sep 1.4 mag 6.64,11.80 Sp A4V dist. 134.77 pc (439.62 l.y.)
Coord 2000 |
18081+0213 |
|
Discov num |
BU 636 |
|
Comp |
AB |
|
Coord arcsec 2000 |
18 08 07.24 +02 13 07.2 |
|
Date first |
1878 |
|
Date last |
2013 |
|
Obs |
12 |
|
Pa first |
127 |
|
Pa last |
119.8 |
|
P.A. Now (θ) |
119.8° |
|
Sep first |
4.9 |
|
Sep last |
1.439 |
|
Sep. Now (ρ) |
1.439" |
|
Mag pri |
6.64 |
|
Mag sec |
11.80 |
|
delta mag (ΔM) |
5.16 |
|
Spectral class |
A4V (white) |
|
Pri motion ra |
+012 |
|
Sec motion ra |
|
|
Pri motion dec |
-008 |
|
Sec motion dec |
|
|
Notes |
|
|
Nature of this double is uncertain.
18081+0213 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
123156 |
18 08 07 +02 13 07 |
GII 259 Aa,Ab |
2013 |
1 |
168 |
0.1 |
7.40 |
7.40 |
0.00 |
|
|
Show |
HD 165887 |
123156 |
18 08 07 +02 13 07 |
BU 636 AB |
2013 |
12 |
120 |
1.4 |
6.64 |
11.80 |
5.16 |
|
<=== |
Show |
|
123156 |
18 08 07 +02 13 07 |
BU 636 AC |
2015 |
6 |
93 |
11.7 |
6.64 |
13.60 |
6.96 |
|
|
Show |
|
123156 |
18 08 07 +02 13 07 |
BU 636 AD |
2002 |
5 |
348 |
40.8 |
6.64 |
11.12 |
4.48 |
|
|
Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 165887 |
|
Constellation |
Ophiuchus |
|
SAO |
123156 |
|
HIP |
88841 |
|
Tycho2 |
0435-04738-1 |
|
Gaia DR2 |
4468305755100841472 |
|
HD |
165887 |
|
GC |
24712 |
|
BD |
BD+02 3498 |
|
Distance |
134.77 |
|
Distance ly |
439.62 |
|