18515-2143 DON 928

 
 
18h 51m 27.48s -21 43' 05.4" P.A. 277 sep 4.9 mag 10.22,11.90 Sp B9IV/V
 
 
Coord 2000
18515-2143
Discov num
DON 928
Comp
Coord arcsec 2000
18 51 27.48 -21 43 05.4
Date first
1922
Date last
1999
Obs
5
Pa first
271
Pa last
277
P.A. Now (θ)
277°
Sep first
3.5
Sep last
4.9
Sep. Now (ρ)
4.9"
Mag pri
10.22
Mag sec
11.90
delta mag (ΔM)
1.68
Spectral class
B9IV/V (blue-white)
Pri motion ra
+025
Sec motion ra
-101
Pri motion dec
-008
Sec motion dec
+011
Notes
rPM=1.254
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
277.2
Precise sep
4.864
Cdsa2 id
DON 928
Constellation
Sagittarius
Ra deg
18.857633333333336
De deg
-21.718166666666665
last precise pa
277.2
last precise sep
4.864
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18515-2143 DON 928 1998 4 277 4.8 10.22 11.90 B9IV/V D 185127.48-214305.4
18515-2143 DON 928 1999 5 277 4.9 10.22 11.90 B9IV/V D 185127.48-214305.4

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