20511+5125 BU 155 AC
20h 51m 05.41s +51° 25' 01.7" P.A. 40.00 sep 14.8 mag 7.36,12.60 Sp A9IV dist. 124.53 pc (406.22 l.y.)
| Coord 2000 |
20511+5125 |
|
Discov num |
BU 155 |
|
Comp |
AC |
|
Coord arcsec 2000 |
20 51 05.41 +51 25 01.7 |
|
| Date first |
1885 |
|
Date last |
2015 |
|
Obs |
8 |
|
| Pa first |
26 |
|
Pa last |
40 |
|
P.A. Now (θ) |
40° |
|
| Sep first |
17.7 |
|
Sep last |
14.763 |
|
Sep. Now (ρ) |
14.763" |
|
| Mag pri |
7.36 |
|
Mag sec |
12.60 |
|
delta mag (ΔM) |
5.24 |
|
Spectral class |
A9IV (white) |
|
| Pri motion ra |
+040 |
|
Sec motion ra |
|
|
| Pri motion dec |
+041 |
|
Sec motion dec |
|
|
| Notes |
W
|
|
Nature of this double is uncertain.
20511+5125 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 198834 |
32933 |
20 51 05 +51 25 02 |
BU 155 AB |
2018 |
58 |
40 |
0.7 |
7.36 |
8.13 |
0.77 |
Y |
|
| Show |
|
32933 |
20 51 05 +51 25 02 |
BU 155 AC |
2015 |
8 |
40 |
14.8 |
7.36 |
12.60 |
5.24 |
|
<=== |
| Show |
|
32933 |
20 51 05 +51 25 02 |
BU 155 AD |
2015 |
8 |
48 |
191.8 |
7.36 |
11.50 |
4.14 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
32933 |
|
HIP |
102921 |
|
Tycho2 |
3587-01042-1 |
|
| Gaia DR2 |
2169957120223515776 |
|
HD |
198834 |
|
BD |
BD+50 3215 |
|
Distance |
124.53 |
|
| Distance ly |
406.22 |
|
