20493+3217 LDS 2931 AB
20h 49m 16.23s +32° 17' 05.2" P.A. 246.00 sep 34.4 mag 8.26,16.63 Sp K2 dist. 24.05 pc (78.45 l.y.)
| Coord 2000 |
20493+3217 |
|
Discov num |
LDS2931 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 49 16.23 +32 17 05.2 |
|
| Date first |
1953 |
|
Date last |
2016 |
|
Obs |
15 |
|
| Pa first |
246 |
|
Pa last |
246.1 |
|
P.A. Now (θ) |
246.1° |
|
| Sep first |
35.0 |
|
Sep last |
34.436 |
|
Sep. Now (ρ) |
34.436" |
|
| Mag pri |
8.26 |
|
Mag sec |
16.63 |
|
delta mag (ΔM) |
8.37 |
|
Spectral class |
K2 (yellow-orange) |
|
| Pri motion ra |
-159 |
|
Sec motion ra |
-158 |
|
| Pri motion dec |
-266 |
|
Sec motion dec |
-278 |
|
| Notes |
V
(Proper motion indicates physical) |
|
rPM=0.038 (< 0.3, Physical double)
This double is physical.
20493+3217 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
70545 |
20 49 16 +32 17 05 |
LDS 2931 AB |
2016 |
15 |
246 |
34.4 |
8.26 |
16.63 |
8.37 |
|
<=== |
| Show |
V2431 Cyg |
70545 |
20 49 16 +32 17 05 |
HLA 28 AC |
2016 |
2 |
125 |
5.3 |
6.00 |
12.90 |
6.90 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
V2431 Cyg |
|
Constellation |
Cygnus |
|
SAO |
70545 |
|
HIP |
102766 |
|
| Tycho2 |
2691-00059-1 |
|
HD |
198425 |
|
BD |
BD+31 4230 |
|
Distance |
24.05 |
|
| Distance ly |
78.45 |
|
