18531-2745 I  1031

 
 
18h 53m 07.64s -27 45' 23.3" P.A. 342 sep 0.4 mag 7.70,8.90 Sp A9V
 
 
Coord 2000
18531-2745
Discov num
I  1031
Comp
Coord arcsec 2000
18 53 07.64 -27 45 23.3
Date first
1910
Date last
2013
Obs
13
Pa first
280
Pa last
342
P.A. Now (θ)
342°
Sep first
0.5
Sep last
0.4
Sep. Now (ρ)
0.4"
Mag pri
7.70
Mag sec
8.90
delta mag (ΔM)
1.2
Spectral class
A9V (white)
Pri motion ra
+004
Sec motion ra
Pri motion dec
+025
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
341.9
Precise sep
0.387
Constellation
Sagittarius
last precise pa
341.9
last precise sep
0.387
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18531-2745 I 1031 1990 11 323 0.4 7.70 8.90 A9V 185307.64-274523.3
18531-2745 I 1031 2008 12 157 0.4 7.70 8.90 A9V 185307.64-274523.3
18531-2745 I 1031 2013 13 342 0.4 7.70 8.90 A9V 185307.64-274523.3

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