21548+4548 COU 2137 Aa,Ab
21h 54m 49.88s +45° 47' 29.8" P.A. 225.00 sep 0.2 mag 8.86,9.32 Sp A0 dist. 74.74 pc (243.8 l.y.)
| Coord 2000 |
21548+4548 |
|
Discov num |
COU2137 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
21 54 49.88 +45 47 29.8 |
|
| Date first |
1982 |
|
Date last |
2016 |
|
Obs |
9 |
|
| Pa first |
233 |
|
Pa last |
225.1 |
|
P.A. Now (θ) |
225.1° |
|
| Sep first |
0.2 |
|
Sep last |
0.171 |
|
Sep. Now (ρ) |
0.171" |
|
| Mag pri |
8.86 |
|
Mag sec |
9.32 |
|
delta mag (ΔM) |
0.46 |
|
Spectral class |
A0 (white) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
|
|
| Pri motion dec |
-001 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21548+4548 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
51429 |
21 54 50 +45 47 30 |
COU 2137 Aa,Ab |
2016 |
9 |
225 |
0.2 |
8.86 |
9.32 |
0.46 |
|
<=== |
| Show |
HD 208395 |
51429 |
21 54 50 +45 47 30 |
STF 2846 AB |
2016 |
30 |
266 |
3.6 |
8.43 |
10.30 |
1.87 |
|
|
| Show |
|
51429 |
21 54 50 +45 47 30 |
STF 2846 AC |
2016 |
11 |
155 |
33.2 |
8.43 |
10.90 |
2.47 |
|
|
| Show |
|
51429 |
21 54 50 +45 47 30 |
STF 2846 AD |
2016 |
2 |
87 |
3.4 |
8.43 |
|
|
|
|
Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
51429 |
|
HIP |
108161 |
|
Tycho2 |
3604-00877-1 |
|
| Gaia DR2 |
1973643957645741056 |
|
HD |
208395 |
|
BD |
BD+45 3721 |
|
Distance |
74.74 |
|
| Distance ly |
243.8 |
|
