21009+4730 BU 1290 BD
21h 00m 56.53s +47° 29' 44.5" P.A. 22.00 sep 2.5 mag 10.65,15.00
Coord 2000 |
21009+4730 |
|
Discov num |
BU 1290 |
|
Comp |
BD |
|
Coord arcsec 2000 |
21 00 56.53 +47 29 44.5 |
|
Date first |
1898 |
|
Date last |
2016 |
|
Obs |
4 |
|
Pa first |
25 |
|
Pa last |
21.6 |
|
P.A. Now (θ) |
21.6° |
|
Sep first |
2.4 |
|
Sep last |
2.489 |
|
Sep. Now (ρ) |
2.489" |
|
Mag pri |
10.65 |
|
Mag sec |
15.00 |
|
delta mag (ΔM) |
4.35 |
|
Spectral class |
|
|
Pri motion ra |
+041 |
|
Sec motion ra |
|
|
Pri motion dec |
+047 |
|
Sec motion dec |
|
|
Notes |
|
|
Nature of this double is uncertain.
21009+4730 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
|
21 00 56 +47 29 37 |
BU 1290 AB |
2019 |
20 |
35 |
9.3 |
10.09 |
10.65 |
0.56 |
|
|
Show |
|
|
21 00 56 +47 29 37 |
BU 1290 AC |
2016 |
3 |
266 |
3.5 |
10.09 |
14.00 |
3.91 |
|
|
Show |
|
|
21 00 57 +47 29 44 |
BU 1290 BD |
2016 |
4 |
22 |
2.5 |
10.65 |
15.00 |
4.35 |
|
<=== |
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Cygnus |
|
Tycho2 |
3592-04619-2 |
|
Gaia DR2 |
2163900078160233984 |
|