16315+3331 BU 816 (31 Her)
16h 31m 30.59s +33° 30' 49.3" P.A. 221.00 sep 4.9 mag 7.12,12.20 Sp A2V dist. 125.94 pc (410.82 l.y.)
Coord 2000 |
16315+3331 |
|
Discov num |
BU 816 |
|
Comp |
|
|
Coord arcsec 2000 |
16 31 30.59 +33 30 49.3 |
|
Date first |
1881 |
|
Date last |
2018 |
|
Obs |
38 |
|
Pa first |
224 |
|
Pa last |
220.6 |
|
P.A. Now (θ) |
220.6° |
|
Sep first |
5.0 |
|
Sep last |
4.87 |
|
Sep. Now (ρ) |
4.87" |
|
Mag pri |
7.12 |
|
Mag sec |
12.20 |
|
delta mag (ΔM) |
5.08 |
|
Spectral class |
A2V (white) |
|
Pri motion ra |
-025 |
|
Sec motion ra |
-020 |
|
Pri motion dec |
-011 |
|
Sec motion dec |
-010 |
|
Notes |
T
(Parallax indicates physical) |
|
rPM=0.187 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
31 Her |
|
Constellation |
Hercules |
|
SAO |
65360 |
|
HIP |
80927 |
|
Tycho2 |
2584-01679-1 |
|
Gaia DR2 |
1325796996291354880 |
|
HD |
149141 |
|
GC |
22235 |
|
ADS |
10100 |
|
BD |
BD+33 2742 |
|
Flamsteed |
31 Herculis |
|
Flamsteed name |
31 Her |
|
Distance |
125.94 |
|
Distance ly |
410.82 |
|