18390+5559 A  1380AB

 
 
18H 39M 02.89S +55 59' 24.4" P.A. 20 SEP 0.9 MAG 10.50,10.32 SP G0
 
 
Coord 2000
18390+5559
Discov num
A  1380
Comp
AB
Coord arcsec 2000
18 39 02.89 +55 59 24.4
Date first
1906
Date last
2015
Obs
15
Pa first
14
Pa last
20
P.A. Now (θ)
20°
Sep first
0.8
Sep last
0.9
Sep. Now (ρ)
0.9"
Mag pri
10.50
Mag sec
10.32
delta mag (ΔM)
0.18
Spectral class
G0 (yellow)
Pri motion ra
+013
Sec motion ra
+013
Pri motion dec
+025
Sec motion dec
+025
Notes
Nature of this double is uncertain.
 
 
18390+5559 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 31088 18390+5559 A 1380 AB 1906 2015 15 20 0.9 10.50 10.32 0.18 <===
Show 31088 18390+5559 A 1380 AB,C 1916 2003 5 333 11.8 9.65 14.00 4.35
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Draco
SAO
31088
Tycho2
3909-00609-1
HD
238916
last precise pa
20.3
last precise sep
0.92