21215+5434 ROE 91 AD
21h 21m 29.91s +54° 33' 27.8" P.A. 275.00 sep 74.4 mag 11.61,12.30
| Coord 2000 |
21215+5434 |
|
Discov num |
ROE 91 |
|
Comp |
AD |
|
Coord arcsec 2000 |
21 21 29.91 +54 33 27.8 |
|
| Date first |
1915 |
|
Date last |
2017 |
|
Obs |
5 |
|
| Pa first |
275 |
|
Pa last |
274.9 |
|
P.A. Now (θ) |
274.9° |
|
| Sep first |
72.7 |
|
Sep last |
74.4 |
|
Sep. Now (ρ) |
74.4" |
|
| Mag pri |
11.61 |
|
Mag sec |
12.30 |
|
delta mag (ΔM) |
0.69 |
|
Spectral class |
|
|
| Pri motion ra |
-004 |
|
Sec motion ra |
+001 |
|
| Pri motion dec |
-020 |
|
Sec motion dec |
+007 |
|
| Notes |
|
|
rPM=1.346
This double is not physical.
21215+5434 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 21 30 +54 33 28 |
ROE 91 AB |
2015 |
7 |
250 |
4.9 |
11.90 |
12.60 |
0.70 |
|
|
| Show |
|
|
21 21 30 +54 33 28 |
ROE 91 AC |
2017 |
6 |
187 |
47.5 |
11.61 |
13.46 |
1.85 |
|
|
| Show |
|
|
21 21 30 +54 33 28 |
ROE 91 AD |
2017 |
5 |
275 |
74.4 |
11.61 |
12.30 |
0.69 |
|
<=== |
| Show |
|
|
21 21 30 +54 33 28 |
ROE 91 AE |
2015 |
5 |
256 |
82.1 |
11.61 |
13.22 |
1.61 |
|
|
Quintuple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Gaia DR2 |
2176147817365487360 |
|
