21023+3931 SMY   6AD

 
 
21h 02m 20.95s +39 30' 32.5" P.A. 141 sep 57 mag 6.62,12.61 Sp K3II-III dist. 223.71 pc (729.74 l.y.)
 
 
Coord 2000
21023+3931
Discov num
SMY   6
Comp
AD
Coord arcsec 2000
21 02 20.95 +39 30 32.5
Date first
1862
Date last
2015
Obs
8
Pa first
139
Pa last
141
P.A. Now (θ)
141°
Sep first
54.8
Sep last
57.0
Sep. Now (ρ)
57"
Mag pri
6.62
Mag sec
12.61
delta mag (ΔM)
5.99
Spectral class
K3II-III (yellow-orange)
Pri motion ra
+002
Sec motion ra
-008
Pri motion dec
+001
Sec motion dec
-010
Notes
N (See Notes)
rPM=1.161
This double is not physical.
 
 
21023+3931 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21023+3931 H 4 113 AB 1783 2017 35 300 18.9 6.62 9.49 2.87
Show 21023+3931 H 4 113 AC 1876 2012 10 248 26.7 6.62 12.50 5.88
Show 21023+3931 SMY 6 AD 1862 2015 8 141 57.0 6.62 12.61 5.99 <===
Show 21023+3931 SMY 6 AE 1862 2015 9 87 96.1 6.62 10.88 4.26
Show 21023+3931 WRD 4 AF 1875 2015 5 223 101.8 6.62 12.45 5.83
Show 21023+3931 WRD 4 AG 1875 1875 1 230 95.0 6.62 13.50 6.88
Show 21023+3931 FYM 114 AI 2000 2012 3 277 41.1 6.62 15.20 8.58
Show 21023+3931 WRD 4 ED 2000 2015 4 230 77.7 10.88 12.61 1.73
Show 21023+3931 WRD 4 EH 1951 2015 6 159 37.4 10.88 12.84 1.96
Ninefold system
9 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
140.6
Precise sep
57.039
Constellation
Cygnus
SAO
70818
HIP
103822
Tycho2
3172-01764-1
Gaia DR2
01745880320
HD
200465
BD
BD+38 4321
Distance
223.71
Distance ly
729.74
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21023+3931 SMY 6 AD 2000 4 140 57.0 6.62 12.51 D 210220.96+393032.5
21023+3931 SMY 6 AD 2012 5 141 58.1 6.62 12.51 N D 210220.96+393032.5
21023+3931 SMY 6 AD 2015 8 141 57.0 6.62 12.61 K3II-III N 210220.95+393032.5

If you need more information about this double, apply for a data request form to the WDS.