20486+5029 BU  366AB

 
 
20h 48m 34.14s +50 29' 27.9" P.A. 131 sep 1.5 mag 8.70,8.93 Sp A0
 
 
Coord 2000
20486+5029
Discov num
BU  366
Comp
AB
Coord arcsec 2000
20 48 34.14 +50 29 27.9
Date first
1875
Date last
2016
Obs
32
Pa first
140
Pa last
131
P.A. Now (θ)
131°
Sep first
1.5
Sep last
1.5
Sep. Now (ρ)
1.5"
Mag pri
8.70
Mag sec
8.93
delta mag (ΔM)
0.23
Spectral class
A0 (white)
Pri motion ra
+003
Sec motion ra
+003
Pri motion dec
+007
Sec motion dec
+007
Notes
Nature of this double is uncertain.
 
 
20486+5029 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20486+5029 BU 366 AB 1875 2016 32 131 1.5 8.70 8.93 0.23 <===
Show 20486+5029 BU 366 AC 1875 2003 12 105 51.0 8.70 11.00 2.30
Show 20486+5029 D 23 CD 1876 1991 11 3 1.8 11.00 11.52 0.52
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
130.6
Precise sep
1.493
Constellation
Cygnus
Tycho2
3582-00369-1
HD
198455
last precise pa
130.6
last precise sep
1.493
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20486+5029 BU 366 AB 2005 31 130 1.5 8.70 8.93 A0 204834.14+502927.9
20486+5029 BU 366 AB 2010 32 130 1.5 8.70 8.93 A0 204834.14+502927.9
20486+5029 BU 366 AB 2014 31 129 1.4 8.70 8.93 A0 204834.14+502927.9
20486+5029 BU 366 AB 2016 32 131 1.5 8.70 8.93 A0 204834.14+502927.9

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