21526+4714 LI 7 AB (V1578 Cyg)
21h 52m 34.09s +47° 13' 43.6" P.A. 40.00 sep 4.7 mag 10.16,13.90 Sp B9.5Ve dist. 1000 pc (3262 l.y.)
| Coord 2000 |
21526+4714 |
|
Discov num |
LI 7 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 52 34.09 +47 13 43.6 |
|
| Date first |
1971 |
|
Date last |
2015 |
|
Obs |
5 |
|
| Pa first |
45 |
|
Pa last |
40.3 |
|
P.A. Now (θ) |
40.3° |
|
| Sep first |
5.0 |
|
Sep last |
4.677 |
|
Sep. Now (ρ) |
4.677" |
|
| Mag pri |
10.16 |
|
Mag sec |
13.90 |
|
delta mag (ΔM) |
3.74 |
|
Spectral class |
B9.5Ve (blue-white) |
|
| Pri motion ra |
-003 |
|
Sec motion ra |
|
|
| Pri motion dec |
-002 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21526+4714 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
V1578 Cyg |
|
21 52 34 +47 13 44 |
LI 7 AB |
2015 |
5 |
40 |
4.7 |
10.16 |
13.90 |
3.74 |
|
<=== |
| Show |
|
|
21 52 34 +47 13 44 |
LI 7 AC |
2015 |
4 |
207 |
6.0 |
10.20 |
14.40 |
4.20 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Var name |
V1578 Cyg |
|
Constellation |
Cygnus |
|
HIP |
107983 |
|
Tycho2 |
3608-00755-1 |
|
| Gaia DR2 |
1974732783388041216 |
|
BD |
BD+46 3471 |
|
Distance |
1000 |
|
Distance ly |
3262 |
|
