20490+2932 BRT  51BC

 
 
20h 48m 57.23s +29 32' 17.1" P.A. 127 sep 4.6 mag 10.60,11.80
 
 
Coord 2000
20490+2932
Discov num
BRT  51
Comp
BC
Coord arcsec 2000
20 48 57.23 +29 32 17.1
Date first
1894
Date last
2009
Obs
6
Pa first
121
Pa last
127
P.A. Now (θ)
127°
Sep first
5.7
Sep last
4.6
Sep. Now (ρ)
4.6"
Mag pri
10.60
Mag sec
11.80
delta mag (ΔM)
1.2
Spectral class
Pri motion ra
-018
Sec motion ra
Pri motion dec
+168
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
20490+2932 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20490+2932 BRT 51 AB 1894 2010 6 355 6.6 9.20 10.60 1.40
Show 20490+2932 BRT 51 AC 1894 2010 6 38 4.9 9.20 11.80 2.60
Show 20490+2932 BRT 51 BC 1894 2009 6 127 4.6 10.60 11.80 1.20 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
126.8
Precise sep
4.59
Constellation
Cygnus
last precise pa
126.8
last precise sep
4.59
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20490+2932 BRT 51 BC 1999 5 126 4.8 10.20 11.30 D 204857.23+293217.1
20490+2932 BRT 51 BC 2009 6 127 4.6 10.20 11.30 D 204857.23+293217.1

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