21089+4815 ARG  42BC

 
 
21h 08m 54.44s +48 14' 59.3" P.A. 306 sep 45.2 mag 9.67,11.29 Sp G0
 
 
Coord 2000
21089+4815
Discov num
ARG  42
Comp
BC
Coord arcsec 2000
21 08 54.44 +48 14 59.3
Date first
1899
Date last
2010
Obs
11
Pa first
304
Pa last
306
P.A. Now (θ)
306°
Sep first
44.8
Sep last
45.2
Sep. Now (ρ)
45.2"
Mag pri
9.67
Mag sec
11.29
delta mag (ΔM)
1.62
Spectral class
G0 (yellow)
Pri motion ra
-005
Sec motion ra
-004
Pri motion dec
-021
Sec motion dec
-001
Notes
rPM=0.928
This double is not physical.
 
 
21089+4815 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21089+4815 ARG 42 AB 1899 2013 30 60 21.2 8.81 9.67 0.86
Show 21089+4815 ARG 42 AC 1899 2010 12 333 41.2 8.81 11.29 2.48
Show 21089+4815 ARG 42 BC 1899 2010 11 306 45.2 9.67 11.29 1.62 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
305.8
Precise sep
45.22
Constellation
Cygnus
last precise pa
305.8
last precise sep
45.22
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21089+4815 ARG 42 BC 2000 9 306 45.5 9.67 11.29 G0 D 210854.44+481459.3
21089+4815 ARG 42 BC 2010 10 306 45.2 9.67 11.29 G0 D 210854.44+481459.3

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