18552+1817 J  2931

 
 
18h 55m 17.75s +18 16' 07.4" P.A. 143 sep 5.3 mag 13.20,11.80
 
 
Coord 2000
18552+1817
Discov num
J  2931
Comp
Coord arcsec 2000
18 55 17.75 +18 16 07.4
Date first
1944
Date last
2017
Obs
6
Pa first
105
Pa last
143
P.A. Now (θ)
143°
Sep first
3.0
Sep last
5.3
Sep. Now (ρ)
5.3"
Mag pri
13.20
Mag sec
11.80
delta mag (ΔM)
1.4
Spectral class
Pri motion ra
-036
Sec motion ra
+007
Pri motion dec
-020
Sec motion dec
-066
Notes
U (Proper motion indicates non-physical)
rPM=0.949
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
143
Precise sep
5.257
Constellation
Hercules
last precise pa
143
last precise sep
5.257
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18552+1817 J 2931 1944 1 285 3.0 10.00 14.00 185530.00+181700.0
18552+1817 J 2931 2000 2 139 5.1 10.00 14.00 185517.75+181607.4
18552+1817 J 2931 2001 4 140 5.2 10.00 14.00 D 185517.75+181607.4
18552+1817 J 2931 2010 4 140 5.4 10.00 14.00 185517.75+181607.4
18552+1817 J 2931 2017 6 143 5.3 13.20 11.80 U 185517.75+181607.4

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