20121+4618 OSO 120AD

 
 
20h 12m 05.66s +46 18' 01.7" P.A. 90 sep 20.2 mag 9.13,17.20 Sp K2 dist. 39.84 pc (129.96 l.y.)
 
 
Coord 2000
20121+4618
Discov num
OSO 120
Comp
AD
Coord arcsec 2000
20 12 05.66 +46 18 01.7
Date first
1995
Date last
1995
Obs
1
Pa first
90
Pa last
90
P.A. Now (θ)
90°
Sep first
20.2
Sep last
20.2
Sep. Now (ρ)
20.2"
Mag pri
9.13
Mag sec
17.20
delta mag (ΔM)
8.07
Spectral class
K2 (yellow-orange)
Pri motion ra
+222
Sec motion ra
-020
Pri motion dec
+292
Sec motion dec
-022
Notes
N (See Notes)
rPM=1.081
This double is not physical.
 
 
20121+4618 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20121+4618 OSO 120 AB 1995 1995 1 30 13.5 9.13 17.00 7.87
Show 20121+4618 OSO 120 AC 1995 2003 3 192 16.7 9.13 15.20 6.07
Show 20121+4618 OSO 120 AD 1995 1995 1 90 20.2 9.13 17.20 8.07 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
90
Precise sep
20.2
Constellation
Cygnus
SAO
49312
HIP
99542
Tycho2
3559-02097-1
HD
192239
BD
BD+45 3091
Distance
39.84
Distance ly
129.96
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20121+4618 OSO 120 AD 1995 1 90 20.2 9.06 17.20 N D 201205.66+461801.8

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