21510+6137 STT 451 (HD 207990)
21h 50m 58.10s +61° 36' 59.8" P.A. 219.00 sep 4.2 mag 7.74,8.61 Sp A2
| Coord 2000 |
21510+6137 |
|
Discov num |
STT 451 |
|
Comp |
|
|
Coord arcsec 2000 |
21 50 58.10 +61 36 59.8 |
|
| Date first |
1847 |
|
Date last |
2016 |
|
Obs |
57 |
|
| Pa first |
226 |
|
Pa last |
218.6 |
|
P.A. Now (θ) |
218.6° |
|
| Sep first |
4.5 |
|
Sep last |
4.177 |
|
Sep. Now (ρ) |
4.177" |
|
| Mag pri |
7.74 |
|
Mag sec |
8.61 |
|
delta mag (ΔM) |
0.87 |
|
Spectral class |
A2 (white) |
|
| Pri motion ra |
+022 |
|
Sec motion ra |
+027 |
|
| Pri motion dec |
+009 |
|
Sec motion dec |
+008 |
|
| Notes |
V
(Proper motion indicates physical) |
|
rPM=0.181 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 207990 |
|
Constellation |
Cepheus |
|
SAO |
19677 |
|
Tycho2 |
4262-01417-1 |
|
| Gaia DR2 |
2204252193561751424 |
|
HD |
207990 |
|
GC |
30604 |
|
