21426+4226 BU 1505BC

 
 
21h 42m 32.99s +42 26' 16.6" P.A. 177 sep 21.4 mag 10.56,12.68 dist. 263.85 pc (860.68 l.y.)
 
 
Coord 2000
21426+4226
Discov num
BU 1505
Comp
BC
Coord arcsec 2000
21 42 32.99 +42 26 16.6
Date first
1998
Date last
2017
Obs
6
Pa first
176
Pa last
177
P.A. Now (θ)
177°
Sep first
21.3
Sep last
21.4
Sep. Now (ρ)
21.4"
Mag pri
10.56
Mag sec
12.68
delta mag (ΔM)
2.12
Spectral class
Pri motion ra
+003
Sec motion ra
-009
Pri motion dec
-014
Sec motion dec
-007
Notes
rPM=0.97
This double is not physical.
 
 
21426+4226 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21426+4226 STF2820 AB 1895 2017 16 230 16.0 7.48 10.56 3.08
Show 21426+4226 BU 1505 AC 1903 2017 7 200 33.6 7.48 12.68 5.20
Show 21426+4226 BU 1505 BC 1998 2017 6 177 21.4 10.56 12.68 2.12 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
177.2
Precise sep
21.4
Constellation
Cygnus
SAO
51214
HIP
107174
Tycho2
3192-01925-1
Gaia DR2
64967423872
HD
206673
Distance
263.85
Distance ly
860.68
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21426+4226 BU 1505 BC 2006 2 176 21.9 10.56 12.68 D 214232.99+422616.6
21426+4226 BU 1505 BC 2012 4 174 21.9 10.56 12.68 D 214232.99+422616.6
21426+4226 BU 1505 BC 2017 6 177 21.4 10.56 12.68 214232.99+422616.6

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