21516+1950 HJ 947 AB (HD 207840)
21h 51m 34.24s +19° 49' 35.9" P.A. 98.00 sep 18.9 mag 5.78,11.39 Sp B8III dist. 161.55 pc (526.98 l.y.)
| Coord 2000 |
21516+1950 |
|
Discov num |
HJ 947 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 51 34.24 +19 49 35.9 |
|
| Date first |
1827 |
|
Date last |
2012 |
|
Obs |
18 |
|
| Pa first |
93 |
|
Pa last |
98 |
|
P.A. Now (θ) |
98° |
|
| Sep first |
15.0 |
|
Sep last |
18.9 |
|
Sep. Now (ρ) |
18.9" |
|
| Mag pri |
5.78 |
|
Mag sec |
11.39 |
|
delta mag (ΔM) |
5.61 |
|
Spectral class |
B8III (blue-white) |
|
| Pri motion ra |
+021 |
|
Sec motion ra |
+007 |
|
| Pri motion dec |
+013 |
|
Sec motion dec |
+001 |
|
| Notes |
N
(See Notes) |
|
rPM=0.747
Nature of this double is uncertain.
21516+1950 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 207840 |
107445 |
21 51 34 +19 49 36 |
HJ 947 AB |
2012 |
18 |
98 |
18.9 |
5.78 |
11.39 |
5.61 |
|
<=== |
| Show |
|
107445 |
21 51 34 +19 49 36 |
HJ 947 AC |
2012 |
11 |
310 |
24.3 |
5.78 |
13.51 |
7.73 |
|
|
| Show |
|
|
21 51 36 +19 49 34 |
HJ 947 BC |
2015 |
14 |
297 |
41.1 |
11.39 |
13.51 |
2.12 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 207840 |
|
Constellation |
Pegasus |
|
SAO |
107445 |
|
HIP |
107887 |
|
| Tycho2 |
1674-00925-1 |
|
Gaia DR2 |
1780482957460615040 |
|
HD |
207840 |
|
HR |
8348 |
|
| GC |
30594 |
|
ADS |
15383 |
|
BD |
BD+19 4797 |
|
Distance |
161.55 |
|
| Distance ly |
526.98 |
|
