17217-4524 DON 831

 
 
17h 21m 46.07s -45 23' 54.2" P.A. 30 sep 0.3 mag 10.60,11.60 Sp B9IV
 
 
Coord 2000
17217-4524
Discov num
DON 831
Comp
Coord arcsec 2000
17 21 46.07 -45 23 54.2
Date first
1929
Date last
1948
Obs
2
Pa first
30
Pa last
30
P.A. Now (θ)
30°
Sep first
0.2
Sep last
0.3
Sep. Now (ρ)
0.3"
Mag pri
10.60
Mag sec
11.60
delta mag (ΔM)
1
Spectral class
B9IV (blue-white)
Pri motion ra
-009
Sec motion ra
Pri motion dec
-016
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
30.4
Precise sep
0.32
Constellation
Scorpius
Tycho2
8341-00302-1
HD
156786
last precise pa
30.4
last precise sep
0.32
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17217-4524 DON 831 1948 2 30 0.3 10.60 11.60 B9IV 172146.07-452354.2

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