18218+2130 BU 641 (HD 169031)
18h 21m 48.44s +21° 30' 27.9" P.A. 340.00 sep 0.8 mag 7.03,8.66 Sp B9.5II dist. 264.55 pc (862.96 l.y.)
| Coord 2000 |
18218+2130 |
|
Discov num |
BU 641 |
|
Comp |
|
|
Coord arcsec 2000 |
18 21 48.44 +21 30 27.9 |
|
| Date first |
1878 |
|
Date last |
2020 |
|
Obs |
84 |
|
| Pa first |
351 |
|
Pa last |
340.3 |
|
P.A. Now (θ) |
340.3° |
|
| Sep first |
1.0 |
|
Sep last |
0.757 |
|
Sep. Now (ρ) |
0.757" |
|
| Mag pri |
7.03 |
|
Mag sec |
8.66 |
|
delta mag (ΔM) |
1.63 |
|
Spectral class |
B9.5II (blue-white) |
|
| Pri motion ra |
-003 |
|
Sec motion ra |
-003 |
|
| Pri motion dec |
-011 |
|
Sec motion dec |
-011 |
|
| Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 169031 |
|
Constellation |
Hercules |
|
SAO |
85969 |
|
HIP |
89999 |
|
| Tycho2 |
1580-01652-1 |
|
Gaia DR2 |
4528879465585626752 |
|
HD |
169031 |
|
BD |
BD+21 3400 |
|
| Distance |
264.55 |
|
Distance ly |
862.96 |
|
