20310+2007 HJ 2974

 
 
20h 30m 59.23s +20 07' 15.6" P.A. 297 sep 14.4 mag 9.70,9.93 Sp K2
 
 
Coord 2000
20310+2007
Discov num
HJ 2974
Comp
Coord arcsec 2000
20 30 59.23 +20 07 15.6
Date first
1831
Date last
2016
Obs
22
Pa first
287
Pa last
297
P.A. Now (θ)
297°
Sep first
15.0
Sep last
14.4
Sep. Now (ρ)
14.4"
Mag pri
9.70
Mag sec
9.93
delta mag (ΔM)
0.23
Spectral class
K2 (yellow-orange)
Pri motion ra
-008
Sec motion ra
-010
Pri motion dec
-019
Sec motion dec
-003
Notes
rPM=0.782
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
297.2
Precise sep
14.414
Constellation
Delphinus
SAO
106193
Tycho2
1640-00308-1
Gaia DR2
41508164352
HD
352419
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20310+2007 HJ 2974 2004 14 297 14.3 9.70 9.93 K2 D 203059.23+200715.6
20310+2007 HJ 2974 2010 16 297 14.4 9.70 9.93 K2 203059.23+200715.6
20310+2007 HJ 2974 2016 17 297 14.4 9.70 9.93 K2 203059.23+200715.6

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