20021+5439 BU  427CD

 
 
20h 02m 22.85s +54 40' 07.5" P.A. 336 sep 3.1 mag 8.39,10.18 Sp F2III
 
 
Coord 2000
20021+5439
Discov num
BU  427
Comp
CD
Coord arcsec 2000
20 02 22.85 +54 40 07.5
Date first
1877
Date last
2011
Obs
15
Pa first
337
Pa last
336
P.A. Now (θ)
336°
Sep first
3.0
Sep last
3.1
Sep. Now (ρ)
3.1"
Mag pri
8.39
Mag sec
10.18
delta mag (ΔM)
1.79
Spectral class
F2III (yellow-white)
Pri motion ra
+001
Sec motion ra
+000
Pri motion dec
-006
Sec motion dec
+000
Notes
N (See Notes)
rPM=1
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 20021+5439 BU 427 CD 1877 2011 15 336 3.1 8.39 10.18 1.79 <===
Show 20021+5439 ENG 68 CE 1884 2009 12 158 160.0 8.39 8.92 0.53
Show 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
336.2
Precise sep
3.097
Constellation
Cygnus
Tycho2
3940-00754-1
HD
190464
last precise pa
336.2
last precise sep
3.097
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20021+5439 BU 427 CD 1999 12 338 3.1 8.39 10.18 F2III 200222.85+544007.5
20021+5439 BU 427 CD 2010 13 337 3.0 8.39 10.18 F2III 200222.85+544007.5
20021+5439 BU 427 CD 2011 15 336 3.1 8.39 10.18 F2III 200222.85+544007.5

If you need more information about this double, apply for a data request form to the WDS.