20307+1718 BPM2178

 
 
20h 30m 43.56s +17 18' 29.8" P.A. 217 sep 109.7 mag 13.20,14.68
 
 
Coord 2000
20307+1718
Discov num
BPM2178
Comp
Coord arcsec 2000
20 30 43.56 +17 18 29.8
Date first
1995
Date last
2010
Obs
4
Pa first
217
Pa last
217
P.A. Now (θ)
217°
Sep first
110.0
Sep last
109.7
Sep. Now (ρ)
109.7"
Mag pri
13.20
Mag sec
14.68
delta mag (ΔM)
1.48
Spectral class
Pri motion ra
-011
Sec motion ra
-008
Pri motion dec
-014
Sec motion dec
+001
Notes
N V (See Notes, Proper motion indicates physical)
rPM=0.859
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
217.3
Precise sep
109.71
Constellation
Delphinus
Tycho2
1636-01880-1
last precise pa
217.3
last precise sep
109.71
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20307+1718 BPM2178 2000 2 217 110.0 13.20 14.68 NV 203043.56+171829.8
20307+1718 BPM2178 2001 3 217 110.0 13.20 14.68 NV 203043.56+171829.8
20307+1718 BPM2178 2010 4 217 109.8 13.20 14.68 NV 203043.56+171829.8

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