20379+4757 HDS 2944 Ca,Cb
20h 37m 49.73s +47° 55' 48.4" P.A. 29.00 sep 0.4 mag 8.75,12.31 Sp B8 dist. 581.4 pc (1896.53 l.y.)
| Coord 2000 |
20379+4757 |
|
Discov num |
HDS2944 |
|
Comp |
Ca,Cb |
|
Coord arcsec 2000 |
20 37 49.73 +47 55 48.4 |
|
| Date first |
1991 |
|
Date last |
2008 |
|
Obs |
3 |
|
| Pa first |
9 |
|
Pa last |
29.4 |
|
P.A. Now (θ) |
29.4° |
|
| Sep first |
0.4 |
|
Sep last |
0.374 |
|
Sep. Now (ρ) |
0.374" |
|
| Mag pri |
8.75 |
|
Mag sec |
12.31 |
|
delta mag (ΔM) |
3.56 |
|
Spectral class |
B8 (blue-white) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
|
|
| Pri motion dec |
+001 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
20379+4757 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 196808 |
49879 |
20 37 51 +47 56 42 |
STF 2707 AB |
2015 |
34 |
29 |
21.8 |
7.94 |
9.45 |
1.51 |
|
|
| Show |
|
49879 |
20 37 51 +47 56 42 |
STF 2707 AC |
2015 |
35 |
195 |
55.3 |
7.94 |
8.62 |
0.68 |
|
|
| Show |
|
49879 |
20 37 51 +47 56 42 |
ES 2697 AD |
2015 |
7 |
192 |
17.5 |
7.94 |
14.30 |
6.36 |
|
|
| Show |
|
|
20 37 52 +47 57 01 |
GUI 33 BC |
2015 |
30 |
199 |
76.6 |
9.45 |
8.62 |
0.83 |
|
|
| Show |
|
|
20 37 50 +47 55 48 |
HDS 2944 Ca,Cb |
2008 |
3 |
29 |
0.4 |
8.75 |
12.31 |
3.56 |
|
<=== |
Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
HIP |
101801 |
|
Tycho2 |
3578-02322-1 |
|
Gaia DR2 |
2167668585544641536 |
|
| BD |
BD+47 3152 |
|
Distance |
581.4 |
|
Distance ly |
1896.53 |
|
