20231+4048 GRF  15

 
 
20h 23m 06.70s +40 48' 01.7" P.A. 139.00 sep 199.3 mag 7.48,7.19 Sp K1III+B9I
 
 
Coord 2000
20231+4048
Discov num
GRF  15
Comp
Coord arcsec 2000
20 23 06.70 +40 48 01.7
Date first
1893
Date last
2013
Obs
7
Pa first
138
Pa last
139
P.A. Now (θ)
139°
Sep first
198.9
Sep last
199.3
Sep. Now (ρ)
199.3"
Mag pri
7.48
Mag sec
7.19
delta mag (ΔM)
0.29
Spectral class
K1III+B9I (yellow-orange/blue-white)
Pri motion ra
+029
Sec motion ra
-003
Pri motion dec
+008
Sec motion dec
-006
Notes
V U (Proper motion indicates physical, Proper motion indicates non-physical)
Visually invisible, K-band or other infrared star rPM=1.161
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
139.4
Precise sep
199.26
Constellation
Cygnus
SAO
49556
Tycho2
3156-02039-1
Gaia DR2
63079073280
HD
194241
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20231+4048 GRF 15 2000 1 138 198.0 7.40 7.10 K1III+B9I V 202306.70+404801.7
20231+4048 GRF 15 2013 5 139 199.3 7.48 7.19 K1III+B9I VU 202306.70+404801.7

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