21432+3801 BLL 55 AB (RV Cyg)
21h 43m 16.33s +38° 01' 03.0" P.A. 117.00 sep 142.4 mag 8.43,10.92 Sp CII dist. 1562.5 pc (5096.88 l.y.)
| Coord 2000 |
21432+3801 |
|
Discov num |
BLL 55 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 43 16.33 +38 01 03.0 |
|
| Date first |
1878 |
|
Date last |
2015 |
|
Obs |
10 |
|
| Pa first |
118 |
|
Pa last |
116.8 |
|
P.A. Now (θ) |
116.8° |
|
| Sep first |
140.9 |
|
Sep last |
142.38 |
|
Sep. Now (ρ) |
142.38" |
|
| Mag pri |
8.43 |
|
Mag sec |
10.92 |
|
delta mag (ΔM) |
2.49 |
|
Spectral class |
CII (red carbon star) |
|
| Pri motion ra |
-006 |
|
Sec motion ra |
+008 |
|
| Pri motion dec |
-008 |
|
Sec motion dec |
+006 |
|
| Notes |
N
(See Notes) |
|
rPM=1.98
This double is not physical.
21432+3801 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
71642 |
21 43 16 +38 01 03 |
HDS 3094 Aa,Ab |
1991 |
1 |
245 |
0.1 |
8.28 |
8.64 |
0.36 |
|
|
| Show |
RV Cyg |
71642 |
21 43 16 +38 01 03 |
BLL 55 AB |
2015 |
10 |
117 |
142.4 |
8.43 |
10.92 |
2.49 |
|
<=== |
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
RV Cyg |
|
Constellation |
Cygnus |
|
SAO |
71642 |
|
HIP |
107242 |
|
| Tycho2 |
3184-02150-1 |
|
Gaia DR2 |
1952830855359293312 |
|
HD |
206750 |
|
GC |
30416 |
|
| BD |
BD+37 4407 |
|
Distance |
1562.5 |
|
Distance ly |
5096.88 |
|
