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
Cdsa2 id
I 1031
Constellation
Sagittarius
Ra deg
18.885455555555556
De deg
-27.75647222222222
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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