18218+2130 BU  641

 
 
18h 21m 48.44s +21 30' 27.9" P.A. 341 sep 0.8 mag 7.03,8.66 Sp B9.5II dist. 264.55 pc (862.96 l.y.)
 
 
Coord 2000
18218+2130
Discov num
BU  641
Comp
Coord arcsec 2000
18 21 48.44 +21 30 27.9
Date first
1878
Date last
2015
Obs
80
Pa first
351
Pa last
341
P.A. Now (θ)
341°
Sep first
1.0
Sep last
0.8
Sep. Now (ρ)
0.8"
Mag pri
7.03
Mag sec
8.66
delta mag (ΔM)
1.63
Spectral class
B9.5II (blue-white)
Pri motion ra
-003
Sec motion ra
-003
Pri motion dec
-011
Sec motion dec
-011
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
341.3
Precise sep
0.78
Constellation
Hercules
SAO
85969
HIP
89999
Tycho2
1580-01652-1
HD
169031
BD
BD+21 3400
Distance
264.55
Distance ly
862.96
last precise pa
341.3
last precise sep
0.78
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18218+2130 BU 641 2004 74 341 0.8 7.03 8.66 B9.5II D 182148.44+213027.9
18218+2130 BU 641 2010 77 340 0.8 7.03 8.66 B9.5II D 182148.44+213027.9
18218+2130 BU 641 2011 79 342 0.8 7.03 8.66 B9.5II 182148.44+213027.9
18218+2130 BU 641 2015 80 341 0.8 7.03 8.66 B9.5II 182148.44+213027.9

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