20121+4618 OSO 120AC

 
 
20h 12m 05.66s +46 18' 01.7" P.A. 192.00 sep 16.7 mag 9.13,15.20 Sp K2 dist. 39.84 pc (129.96 l.y.)
 
 
Coord 2000
20121+4618
Discov num
OSO 120
Comp
AC
Coord arcsec 2000
20 12 05.66 +46 18 01.7
Date first
1995
Date last
2003
Obs
3
Pa first
187
Pa last
192
P.A. Now (θ)
192°
Sep first
14.0
Sep last
16.7
Sep. Now (ρ)
16.7"
Mag pri
9.13
Mag sec
15.20
delta mag (ΔM)
6.07
Spectral class
K2 (yellow-orange)
Pri motion ra
+225
Sec motion ra
Pri motion dec
+292
Sec motion dec
Notes
N (See Notes)
Visually invisible, K-band or other infrared star Nature of this double is uncertain.
 
 
20121+4618 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49312 20121+4618 OSO 120 AB 1995 1995 1 30 13.5 9.13 17.00 7.87
Show 49312 20121+4618 OSO 120 AC 1995 2003 3 192 16.7 9.13 15.20 6.07 <===
Show 49312 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
191.8
Precise sep
16.744
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 AC 1998 2 188 15.2 9.06 15.00 N D 201205.66+461801.8
20121+4618 OSO 120 AC 2003 3 192 16.8 9.13 15.20 N D 201205.66+461801.7

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