21203+4921 BU 839 AB (HD 203416)
21h 20m 18.92s +49° 21' 08.5" P.A. 207.00 sep 14.5 mag 8.55,10.08 Sp M6III
| Coord 2000 |
21203+4921 |
|
Discov num |
BU 839 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 20 18.92 +49 21 08.5 |
|
| Date first |
1881 |
|
Date last |
2016 |
|
Obs |
15 |
|
| Pa first |
202 |
|
Pa last |
207.2 |
|
P.A. Now (θ) |
207.2° |
|
| Sep first |
15.2 |
|
Sep last |
14.52 |
|
Sep. Now (ρ) |
14.52" |
|
| Mag pri |
8.55 |
|
Mag sec |
10.08 |
|
delta mag (ΔM) |
1.53 |
|
Spectral class |
M6III (red) |
|
| Pri motion ra |
+019 |
|
Sec motion ra |
+012 |
|
| Pri motion dec |
+000 |
|
Sec motion dec |
+008 |
|
| Notes |
|
|
rPM=0.559
Nature of this double is uncertain.
21203+4921 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 203416 |
50731 |
21 20 19 +49 21 08 |
BU 839 AB |
2016 |
15 |
207 |
14.5 |
8.55 |
10.08 |
1.53 |
|
<=== |
| Show |
|
50731 |
21 20 19 +49 21 08 |
BU 839 AC |
2016 |
21 |
200 |
22.5 |
8.55 |
9.01 |
0.46 |
|
|
| Show |
|
|
21 20 17 +49 20 36 |
BU 839 CB |
2016 |
9 |
7 |
8.1 |
9.01 |
10.08 |
1.07 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 203416 |
|
Constellation |
Cygnus |
|
SAO |
50731 |
|
Tycho2 |
3597-00520-1 |
|
| Gaia DR2 |
2165085321641897472 |
|
HD |
203416 |
|
