18427-1547 HU  250

 
 
18h 42m 44.23s -15 47' 21.4" P.A. 298 sep 2.2 mag 9.40,14.90 Sp B5Ib
 
 
Coord 2000
18427-1547
Discov num
HU  250
Comp
Coord arcsec 2000
18 42 44.23 -15 47 21.4
Date first
1900
Date last
2000
Obs
3
Pa first
296
Pa last
298
P.A. Now (θ)
298°
Sep first
2.1
Sep last
2.2
Sep. Now (ρ)
2.2"
Mag pri
9.40
Mag sec
14.90
delta mag (ΔM)
5.5
Spectral class
B5Ib (blue-white)
Pri motion ra
-002
Sec motion ra
Pri motion dec
+005
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
297.6
Precise sep
2.2
Constellation
Scutum
SAO
161752
Tycho2
6280-00257-1
HD
172793
last precise pa
297.6
last precise sep
2.2
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18427-1547 HU 250 1922 2 298 2.3 9.35 14.90 B5Ib 184244.23-154721.4
18427-1547 HU 250 2000 3 298 2.2 9.40 14.90 B5Ib 184244.23-154721.4

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