20339+4642 HDS 2940 Aa,Ab
20h 33m 54.84s +46° 41' 37.9" P.A. 46.00 sep 0.3 mag 5.76,9.48 Sp B9sp... dist. 132.28 pc (431.5 l.y.)
| Coord 2000 |
20339+4642 |
|
Discov num |
HDS2940 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
20 33 54.84 +46 41 37.9 |
|
| Date first |
1991 |
|
Date last |
2009 |
|
Obs |
8 |
|
| Pa first |
56 |
|
Pa last |
45.6 |
|
P.A. Now (θ) |
45.6° |
|
| Sep first |
0.3 |
|
Sep last |
0.279 |
|
Sep. Now (ρ) |
0.279" |
|
| Mag pri |
5.76 |
|
Mag sec |
9.48 |
|
delta mag (ΔM) |
3.72 |
|
Spectral class |
B9sp... (blue-white) |
|
| Pri motion ra |
+010 |
|
Sec motion ra |
|
|
| Pri motion dec |
+002 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
20339+4642 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
49804 |
20 33 55 +46 41 38 |
HDS 2940 Aa,Ab |
2009 |
8 |
46 |
0.3 |
5.76 |
9.48 |
3.72 |
|
<=== |
| Show |
V2015 Cyg |
49804 |
20 33 55 +46 41 38 |
BU 1489 AB |
2012 |
13 |
16 |
116.5 |
5.75 |
9.35 |
3.60 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
V2015 Cyg |
|
Constellation |
Cygnus |
|
SAO |
49804 |
|
HIP |
101475 |
|
| Tycho2 |
3573-01361-1 |
|
Gaia DR2 |
2071438198315555584 |
|
HD |
196178 |
|
HR |
7870 |
|
| BD |
BD+46 2977 |
|
Distance |
132.28 |
|
Distance ly |
431.5 |
|
