20454+8105 LDS1938

 
 
20h 45m 22.74s +81 04' 49.1" P.A. 321.00 sep 18.2 mag 9.16,17.20 Sp G5V+DA6
 
 
Coord 2000
20454+8105
Discov num
LDS1938
Comp
Coord arcsec 2000
20 45 22.74 +81 04 49.1
Date first
1962
Date last
2015
Obs
4
Pa first
323
Pa last
321
P.A. Now (θ)
321°
Sep first
18.0
Sep last
18.2
Sep. Now (ρ)
18.2"
Mag pri
9.16
Mag sec
17.20
delta mag (ΔM)
8.04
Spectral class
G5V+DA6 (yellow/white dwarf)
Pri motion ra
+046
Sec motion ra
+054
Pri motion dec
+122
Sec motion dec
+108
Notes
V (Proper motion indicates physical)
rPM=0.124 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
321.2
Precise sep
18.244
Constellation
Draco
SAO
3462
Tycho2
4598-00133-1
Gaia DR2
38861983104
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20454+8105 LDS1938 2000 2 321 18.7 9.16 14.40 G5 D 204522.74+810449.1
20454+8105 LDS1938 2004 3 322 18.4 9.16 14.40 G5 D 204522.74+810449.1
20454+8105 LDS1938 2015 4 321 18.2 9.16 17.20 G5V+DA6 V 204522.74+810449.1

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