21521+2748 HO 171 (HD 207931)
21h 52m 08.95s +27° 48' 02.2" P.A. 342.00 sep 0.8 mag 9.36,9.50 Sp A3 dist. 512.82 pc (1672.82 l.y.)
Coord 2000 |
21521+2748 |
|
Discov num |
HO 171 |
|
Comp |
|
|
Coord arcsec 2000 |
21 52 08.95 +27 48 02.2 |
|
Date first |
1884 |
|
Date last |
2016 |
|
Obs |
64 |
|
Pa first |
359 |
|
Pa last |
341.5 |
|
P.A. Now (θ) |
341.5° |
|
Sep first |
0.6 |
|
Sep last |
0.758 |
|
Sep. Now (ρ) |
0.758" |
|
Mag pri |
9.36 |
|
Mag sec |
9.50 |
|
delta mag (ΔM) |
0.14 |
|
Spectral class |
A3 (white) |
|
Pri motion ra |
+013 |
|
Sec motion ra |
+013 |
|
Pri motion dec |
+004 |
|
Sec motion dec |
+004 |
|
Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 207931 |
|
Constellation |
Pegasus |
|
SAO |
90057 |
|
HIP |
107946 |
|
Tycho2 |
2210-00105-1 |
|
Gaia DR2 |
1800212177498483840 |
|
HD |
207931 |
|
BD |
BD+27 4184 |
|
Distance |
512.82 |
|
Distance ly |
1672.82 |
|