18210-1805 DON 893

 
 
18h 21m 05.96s -18 04' 47.2" P.A. 220 sep 2.8 mag 9.47,13.20 Sp B
 
 
Coord 2000
18210-1805
Discov num
DON 893
Comp
Coord arcsec 2000
18 21 05.96 -18 04 47.2
Date first
1932
Date last
2000
Obs
4
Pa first
226
Pa last
220
P.A. Now (θ)
220°
Sep first
2.4
Sep last
2.8
Sep. Now (ρ)
2.8"
Mag pri
9.47
Mag sec
13.20
delta mag (ΔM)
3.73
Spectral class
B (blue-white)
Pri motion ra
+000
Sec motion ra
Pri motion dec
+003
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
219.7
Precise sep
2.81
Constellation
Sagittarius
Tycho2
6269-01826-1
HD
168553
last precise pa
219.7
last precise sep
2.81
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18210-1805 DON 893 1941 3 222 2.5 9.47 13.20 B 182105.96-180447.2
18210-1805 DON 893 2000 4 220 2.8 9.47 13.20 B 182105.96-180447.2

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