17384-1504 HLD  31

 
 
17h 38m 27.32s -15 04' 13.1" P.A. 330 sep 1.7 mag 10.59,10.62 Sp B9III
 
 
Coord 2000
17384-1504
Discov num
HLD  31
Comp
Coord arcsec 2000
17 38 27.32 -15 04 13.1
Date first
1881
Date last
2008
Obs
10
Pa first
338
Pa last
330
P.A. Now (θ)
330°
Sep first
1.4
Sep last
1.7
Sep. Now (ρ)
1.7"
Mag pri
10.59
Mag sec
10.62
delta mag (ΔM)
0.03
Spectral class
B9III (blue-white)
Pri motion ra
+002
Sec motion ra
+002
Pri motion dec
-001
Sec motion dec
-001
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
329.8
Precise sep
1.66
Constellation
Serpens
Tycho2
6248-00780-2
last precise pa
329.8
last precise sep
1.66
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
17384-1504 HLD 31 1991 9 332 1.6 10.59 10.62 B9III 173827.32-150413.1
17384-1504 HLD 31 2008 10 330 1.6 10.59 10.62 B9III 173827.32-150413.1

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