21404+5029 ES 1104 AB
21h 40m 23.08s +50° 31' 40.5" P.A. 347.00 sep 3.3 mag 9.90,13.40 Sp O7
| Coord 2000 |
21404+5029 |
|
Discov num |
ES 1104 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 40 23.08 +50 31 40.5 |
|
| Date first |
1911 |
|
Date last |
2011 |
|
Obs |
2 |
|
| Pa first |
354 |
|
Pa last |
347.2 |
|
P.A. Now (θ) |
347.2° |
|
| Sep first |
3.3 |
|
Sep last |
3.34 |
|
Sep. Now (ρ) |
3.34" |
|
| Mag pri |
9.90 |
|
Mag sec |
13.40 |
|
delta mag (ΔM) |
3.5 |
|
Spectral class |
O7 (blue) |
|
| Pri motion ra |
-004 |
|
Sec motion ra |
|
|
| Pri motion dec |
-009 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21404+5029 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 40 23 +50 31 40 |
ES 1104 AB |
2011 |
2 |
347 |
3.3 |
9.90 |
13.40 |
3.50 |
|
<=== |
| Show |
|
|
21 40 23 +50 31 40 |
ES 1104 AC |
2015 |
6 |
225 |
13.8 |
9.90 |
12.90 |
3.00 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
3599-00584-1 |
|
Gaia DR2 |
1979274522340043520 |
|
