20021+5439 BU  426AC

 
 
20h 02m 07.92s +54 38' 28.0" P.A. 53 sep 162.9 mag 8.53,8.39 Sp K0
 
 
Coord 2000
20021+5439
Discov num
BU  426
Comp
AC
Coord arcsec 2000
20 02 07.92 +54 38 28.0
Date first
1877
Date last
2009
Obs
16
Pa first
53
Pa last
53
P.A. Now (θ)
53°
Sep first
166.2
Sep last
162.9
Sep. Now (ρ)
162.9"
Mag pri
8.53
Mag sec
8.39
delta mag (ΔM)
0.14
Spectral class
K0 (yellow-orange)
Pri motion ra
+016
Sec motion ra
+001
Pri motion dec
+018
Sec motion dec
-006
Notes
N (See Notes)
rPM=1.175
This double is not physical.
 
 
20021+5439 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20021+5439 BU 426 AB 1877 2016 18 307 5.9 8.53 10.50 1.97
Show 20021+5439 BU 426 AC 1877 2009 16 53 162.9 8.53 8.39 0.14 <===
Show 32226 20021+5439 BU 427 CD 1877 2011 15 336 3.1 8.39 10.18 1.79
Show 32226 20021+5439 ENG 68 CE 1884 2009 12 158 160.0 8.39 8.92 0.53
Show 32230 20021+5439 MLR 580 EF 1981 2008 3 159 0.6 8.90 13.20 4.30
Sextuple system
6 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
52.5
Precise sep
162.94
Constellation
Cygnus
Tycho2
3940-00110-1
HD
190398
last precise pa
52.5
last precise sep
162.94
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20021+5439 BU 426 AC 1999 14 52 162.3 8.53 8.39 K0 D 200207.92+543828.0
20021+5439 BU 426 AC 2009 15 53 162.9 8.53 8.39 K0 D 200207.92+543828.0

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