20421+5013 ES 91 AB
20h 42m 03.97s +50° 13' 49.1" P.A. 189.00 sep 4.6 mag 11.54,11.70
Coord 2000 |
20421+5013 |
|
Discov num |
ES 91 |
|
Comp |
AB |
|
Coord arcsec 2000 |
20 42 03.97 +50 13 49.1 |
|
Date first |
1901 |
|
Date last |
2018 |
|
Obs |
13 |
|
Pa first |
188 |
|
Pa last |
189.2 |
|
P.A. Now (θ) |
189.2° |
|
Sep first |
4.4 |
|
Sep last |
4.555 |
|
Sep. Now (ρ) |
4.555" |
|
Mag pri |
11.54 |
|
Mag sec |
11.70 |
|
delta mag (ΔM) |
0.16 |
|
Spectral class |
|
|
Pri motion ra |
+001 |
|
Sec motion ra |
|
|
Pri motion dec |
+080 |
|
Sec motion dec |
|
|
Notes |
|
|
Nature of this double is uncertain.
20421+5013 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
|
20 42 04 +50 13 49 |
ES 91 AB |
2018 |
13 |
189 |
4.6 |
11.54 |
11.70 |
0.16 |
|
<=== |
Show |
|
|
20 42 04 +50 13 49 |
ES 91 AC |
2018 |
13 |
235 |
17.6 |
11.54 |
11.66 |
0.12 |
|
|
Show |
|
|
20 42 04 +50 13 45 |
ES 91 BC |
2018 |
14 |
247 |
14.8 |
11.05 |
11.66 |
0.61 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Cygnus |
|
Gaia DR2 |
2168333107190987136 |
|