21109+4658 JNN 290BD

 
 
21H 10M 58.78S +46 57' 32.1" P.A. 189 SEP 3.4 MAG 13.79,18.00 SP M2.5
 
 
Coord 2000
21109+4658
Discov num
JNN 290
Comp
BD
Coord arcsec 2000
21 10 58.78 +46 57 32.1
Date first
2011
Date last
2012
Obs
3
Pa first
192
Pa last
189
P.A. Now (θ)
189°
Sep first
3.7
Sep last
3.4
Sep. Now (ρ)
3.4"
Mag pri
13.79
Mag sec
18.00
delta mag (ΔM)
4.21
Spectral class
M2.5 (red)
Pri motion ra
-220
Sec motion ra
Pri motion dec
-314
Sec motion dec
Notes
N U (See Notes, Proper motion indicates non-physical)
This double is not physical.
 
 
21109+4658 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21109+4658 GIC 166 AB 1952 2010 7 150 29.3 13.54 13.79 0.25
Show 21109+4658 JNN 290 BC 2011 2012 3 36 2.4 13.79 17.00 3.21
Show 21109+4658 JNN 290 BD 2011 2012 3 189 3.4 13.79 18.00 4.21 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cygnus
last precise pa
189
last precise sep
3.356