20311+4203 CAN   2Aa,Ab

 
 
20h 31m 08.38s +42 02' 42.3" P.A. 258.00 sep 0.3 mag 11.80,15.00 Sp O9.7II
 
 
Coord 2000
20311+4203
Discov num
CAN   2
Comp
Aa,Ab
Coord arcsec 2000
20 31 08.38 +42 02 42.3
Date first
2006
Date last
2008
Obs
3
Pa first
276
Pa last
258
P.A. Now (θ)
258°
Sep first
0.4
Sep last
0.3
Sep. Now (ρ)
0.3"
Mag pri
11.80
Mag sec
15.00
delta mag (ΔM)
3.2
Spectral class
O9.7II (blue)
Pri motion ra
-003
Sec motion ra
Pri motion dec
-001
Sec motion dec
Notes
V (Proper motion indicates physical)
This double is physical.
 
 
20311+4203 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 31 08 +42 02 42 CAN 2 Aa,Ab 2008 3 258 0.3 11.80 15.00 3.20 <===
Show 20 31 08 +42 02 42 CAN 25 AB 2008 2 221 4.2 7.00 15.40 8.40
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
258.3
Precise sep
0.34
Constellation
Hydra
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20311+4203 CAN 2 Aa,Ab 2008 3 258 0.3 11.80 15.00 O9.7II V 203108.38+420242.3

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