18399+5815 A   251AB

 
 
18h 39m 53.58s +58 14' 55.6" P.A. 57 sep 4 mag 8.10,11.62 Sp F2IV dist. 500 pc (1631 l.y.)
 
 
Coord 2000
18399+5815
Discov num
A   251
Comp
AB
Coord arcsec 2000
18 39 53.58 +58 14 55.6
Date first
1901
Date last
1991
Obs
6
Pa first
56
Pa last
57
P.A. Now (θ)
57°
Sep first
3.8
Sep last
4.0
Sep. Now (ρ)
4"
Mag pri
8.10
Mag sec
11.62
delta mag (ΔM)
3.52
Spectral class
F2IV (yellow-white)
Pri motion ra
+004
Sec motion ra
+004
Pri motion dec
+019
Sec motion dec
+022
Notes
rPM=0.134 (< 0.3, Physical double)
This double is physical.
 
 
18399+5815 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 31097 18399+5815 A 251 AB 1901 1991 6 57 4.0 8.10 11.62 3.52 <===
Show 31097 18399+5815 A 251 AC 1901 2003 5 76 13.7 8.10 14.60 6.50
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
56.8
Precise sep
4.01
Constellation
Draco
SAO
31097
HIP
91526
Tycho2
3917-00913-1
HD
173051
BD
BD+58 1827
Distance
500
Distance ly
1631
last precise pa
56.8
last precise sep
4.01
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18399+5815 A 251 AB 1991 6 57 4.0 8.10 11.62 F2IV 183953.58+581455.6

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