20287+4737 GRF  17

 
 
20h 28m 44.47s +47 36' 40.4" P.A. 102.00 sep 160.1 mag 7.62,8.45 Sp G7II+A0
 
 
Coord 2000
20287+4737
Discov num
GRF  17
Comp
Coord arcsec 2000
20 28 44.47 +47 36 40.4
Date first
1901
Date last
2015
Obs
10
Pa first
102
Pa last
102
P.A. Now (θ)
102°
Sep first
160.2
Sep last
160.1
Sep. Now (ρ)
160.1"
Mag pri
7.62
Mag sec
8.45
delta mag (ΔM)
0.83
Spectral class
G7II+A0 (yellow/white)
Pri motion ra
+001
Sec motion ra
-002
Pri motion dec
-005
Sec motion dec
-009
Notes
rPM=0.542
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
102.4
Precise sep
160.136
Constellation
Cygnus
SAO
49677
Tycho2
3577-01368-1
Gaia DR2
23848624896
HD
195338
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20287+4737 GRF 17 2000 1 103 160.0 7.50 8.40 G7II+A0 202844.47+473640.4
20287+4737 GRF 17 2010 4 102 160.1 7.62 8.45 G7II+A0 202844.47+473640.4
20287+4737 GRF 17 2015 7 102 160.1 7.62 8.45 G7II+A0 202844.47+473640.4

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