20308+3749 SEI1147AC

 
 
20h 30m 45.51s +37 48' 58.8" P.A. 286 sep 14.5 mag 12.25,12.53
 
 
Coord 2000
20308+3749
Discov num
SEI1147
Comp
AC
Coord arcsec 2000
20 30 45.51 +37 48 58.8
Date first
1895
Date last
2015
Obs
8
Pa first
280
Pa last
286
P.A. Now (θ)
286°
Sep first
18.7
Sep last
14.5
Sep. Now (ρ)
14.5"
Mag pri
12.25
Mag sec
12.53
delta mag (ΔM)
0.28
Spectral class
Pri motion ra
+003
Sec motion ra
+035
Pri motion dec
-001
Sec motion dec
+010
Notes
B (Blue magnitudes)
rPM=0.93
This double is not physical.
 
 
20308+3749 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20308+3749 SEI1146 AB 1895 2015 9 42 10.2 12.25 12.27 0.02
Show 20308+3749 SEI1147 AC 1895 2015 8 286 14.5 12.25 12.53 0.28 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
285.6
Precise sep
14.462
Constellation
Cygnus
Tycho2
3153-00884-1
Gaia DR2
82251302656
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20308+3749 SEI1147 AC 1998 3 284 14.9 12.25 12.53 DB 203045.51+374858.8
20308+3749 SEI1147 AC 2002 4 285 14.8 12.25 12.53 DB 203045.51+374858.8
20308+3749 SEI1147 AC 2015 5 286 14.5 12.25 12.53 B 203045.51+374858.8

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