18432+1928 BU 645 (HD 173171)
18h 43m 14.48s +19° 27' 59.2" P.A. 305.00 sep 9.3 mag 7.29,12.10 Sp B9.5IV-V dist. 129.53 pc (422.53 l.y.)
| Coord 2000 |
18432+1928 |
|
Discov num |
BU 645 |
|
Comp |
|
|
Coord arcsec 2000 |
18 43 14.48 +19 27 59.2 |
|
| Date first |
1877 |
|
Date last |
2016 |
|
Obs |
20 |
|
| Pa first |
304 |
|
Pa last |
305.4 |
|
P.A. Now (θ) |
305.4° |
|
| Sep first |
9.9 |
|
Sep last |
9.289 |
|
Sep. Now (ρ) |
9.289" |
|
| Mag pri |
7.29 |
|
Mag sec |
12.10 |
|
delta mag (ΔM) |
4.81 |
|
Spectral class |
B9.5IV-V (blue-white) |
|
| Pri motion ra |
+015 |
|
Sec motion ra |
|
|
| Pri motion dec |
+002 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 173171 |
|
Constellation |
Hercules |
|
SAO |
104023 |
|
HIP |
91816 |
|
| Tycho2 |
1591-01354-1 |
|
Gaia DR2 |
4524625008423974016 |
|
HD |
173171 |
|
BD |
BD+19 3762 |
|
| Distance |
129.53 |
|
Distance ly |
422.53 |
|
