20183+2539 BU  985AB

 
 
20h 18m 17.06s +25 38' 53.7" P.A. 153.00 sep 5.9 mag 6.99,12.80 Sp B2V dist. 729.93 pc (2381.03 l.y.)
 
 
Coord 2000
20183+2539
Discov num
BU  985
Comp
AB
Coord arcsec 2000
20 18 17.06 +25 38 53.7
Date first
1880
Date last
2009
Obs
8
Pa first
149
Pa last
153
P.A. Now (θ)
153°
Sep first
5.0
Sep last
5.9
Sep. Now (ρ)
5.9"
Mag pri
6.99
Mag sec
12.80
delta mag (ΔM)
5.81
Spectral class
B2V (blue-white)
Pri motion ra
+002
Sec motion ra
Pri motion dec
+004
Sec motion dec
Notes
N (See Notes)
Visually invisible, K-band or other infrared star Nature of this double is uncertain.
 
 
20183+2539 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 88490 20183+2539 BU 985 AB 1880 2009 8 153 5.9 6.99 12.80 5.81 <===
Show 88490 20183+2539 HJ 1499 AC 1828 2015 22 355 21.5 6.96 10.87 3.91
Show 88490 20183+2539 WAL 131 AE 1898 2015 22 151 122.8 6.96 8.13 1.17
Show 88490 20183+2539 BU 985 CD 1893 2015 13 67 8.6 10.87 13.60 2.73
Quintuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
153.1
Precise sep
5.94
Constellation
Vulpecula
SAO
88490
HIP
100088
Tycho2
2159-00108-1
Gaia DR2
05164694144
HD
193220
BD
BD+25 4189
Distance
729.93
Distance ly
2381.03
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20183+2539 BU 985 AB 2006 7 158 5.3 6.99 12.80 B2V N D 201817.06+253853.7
20183+2539 BU 985 AB 2009 8 153 5.9 6.99 12.80 B2V N D 201817.06+253853.7

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