20421+5013 ES 91 BC
20h 42m 03.89s +50° 13' 44.8" P.A. 247.00 sep 14.8 mag 11.05,11.66
| Coord 2000 |
20421+5013 |
|
Discov num |
ES 91 |
|
Comp |
BC |
|
Coord arcsec 2000 |
20 42 03.89 +50 13 44.8 |
|
| Date first |
1899 |
|
Date last |
2018 |
|
Obs |
14 |
|
| Pa first |
239 |
|
Pa last |
247.2 |
|
P.A. Now (θ) |
247.2° |
|
| Sep first |
16.6 |
|
Sep last |
14.795 |
|
Sep. Now (ρ) |
14.795" |
|
| Mag pri |
11.05 |
|
Mag sec |
11.66 |
|
delta mag (ΔM) |
0.61 |
|
Spectral class |
|
|
| Pri motion ra |
-037 |
|
Sec motion ra |
-010 |
|
| Pri motion dec |
-154 |
|
Sec motion dec |
-004 |
|
| Notes |
|
|
rPM=0.962
This double is not physical.
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 |
|
Tycho2 |
3582-01142-1 |
|
Gaia DR2 |
2168333107190986624 |
|
