21072+4744 ES 817 AC
21h 07m 13.36s +47° 44' 03.5" P.A. 347.00 sep 22.2 mag 7.33,15.70 Sp A2V dist. 408.16 pc (1331.42 l.y.)
| Coord 2000 |
21072+4744 |
|
Discov num |
ES 817 |
|
Comp |
AC |
|
Coord arcsec 2000 |
21 07 13.36 +47 44 03.5 |
|
| Date first |
1909 |
|
Date last |
2015 |
|
Obs |
6 |
|
| Pa first |
351 |
|
Pa last |
347.1 |
|
P.A. Now (θ) |
347.1° |
|
| Sep first |
24.0 |
|
Sep last |
22.242 |
|
Sep. Now (ρ) |
22.242" |
|
| Mag pri |
7.33 |
|
Mag sec |
15.70 |
|
delta mag (ΔM) |
8.37 |
|
Spectral class |
A2V (white) |
|
| Pri motion ra |
+007 |
|
Sec motion ra |
|
|
| Pri motion dec |
+009 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21072+4744 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 201320 |
50471 |
21 07 13 +47 44 04 |
ES 817 AB |
2015 |
8 |
350 |
10.0 |
7.33 |
11.60 |
4.27 |
|
|
| Show |
|
50471 |
21 07 13 +47 44 04 |
ES 817 AC |
2015 |
6 |
347 |
22.2 |
7.33 |
15.70 |
8.37 |
|
<=== |
| Show |
|
50471 |
21 07 13 +47 44 04 |
ES 817 AD |
2015 |
6 |
85 |
23.7 |
7.33 |
14.20 |
6.87 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
50471 |
|
HIP |
104245 |
|
Tycho2 |
3592-01058-1 |
|
| Gaia DR2 |
2165221966011996288 |
|
HD |
201320 |
|
BD |
BD+47 3297 |
|
Distance |
408.16 |
|
| Distance ly |
1331.42 |
|
