20178+3956 HJ 2951AB

 
 
20h 17m 49.63s +39 55' 33.9" P.A. 125 sep 10.8 mag 8.80,9.54 Sp A2V
 
 
Coord 2000
20178+3956
Discov num
HJ 2951
Comp
AB
Coord arcsec 2000
20 17 49.63 +39 55 33.9
Date first
1831
Date last
2015
Obs
32
Pa first
126
Pa last
125
P.A. Now (θ)
125°
Sep first
12.0
Sep last
10.8
Sep. Now (ρ)
10.8"
Mag pri
8.80
Mag sec
9.54
delta mag (ΔM)
0.74
Spectral class
A2V (white)
Pri motion ra
-009
Sec motion ra
-009
Pri motion dec
-010
Sec motion dec
-012
Notes
N (See Notes)
rPM=0.133 (< 0.3, Physical double)
This double is physical.
 
 
20178+3956 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20178+3956 HJ 2951 AB 1831 2015 32 125 10.8 8.80 9.54 0.74 <===
Show 20178+3956 FOX9014 AC 1912 2015 8 61 24.4 8.80 13.50 4.70
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
125.1
Precise sep
10.775
Constellation
Cygnus
SAO
69777
Tycho2
3155-01860-1
Gaia DR2
24850585472
HD
193247
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20178+3956 HJ 2951 AB 2006 24 125 10.8 8.80 9.54 A2V D 201749.63+395533.9
20178+3956 HJ 2951 AB 2009 25 125 10.9 8.80 9.54 A2V D 201749.63+395533.9
20178+3956 HJ 2951 AB 2010 26 125 10.7 8.80 9.54 A2V D 201749.63+395533.9
20178+3956 HJ 2951 AB 2015 28 125 10.8 8.80 9.54 A2V N 201749.63+395533.9

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