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Doubles in session


Current system
21023+3931
SMY 6 AD


Nearby doubles
17' : 21018+3916
STF2746

17' : 21029+3946
SEI1379

17' : 21020+3914
LV 9

21' : 21014+3948
SEI1370

21' : 21008+3940
SEI1364

22' : 21012+3949
SEI1369

23' : 21042+3924
SEI1389

31' : 21031+3959
LDS2483AB

33' : 21010+3959
A 1438

34' : 20595+3923
SEI1357

36' : 21047+3908
SEI1393

36' : 21051+3914
ES 1987

36' : 20593+3924
TOB 207

36' : 21009+3900
SEI1365

36' : 21054+3937
CRB 137

36' : 20593+3925
SEI1353

37' : 21037+3857
TDT2720

38' : 21015+3855
SEI1371

38' : 20591+3932
TOB 205

38' : 20592+3941
SEI1351AB

39' : 20596+3953
SEI1358

40' : 20589+3931
SEI1348

40' : 21058+3929
A 2691AB

40' : 20592+3946
BKO 481

40' : 20591+3944
BKO 480

42' : 20590+3945
SEI1349



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21023+3931 SMY 6 AD

 
 
21h 02m 20.95s +39° 30' 32.5" P.A. 141.00 sep 57.0 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 140.6 P.A. Now (θ) 140.6°
Sep first 54.8 Sep last 57.039 Sep. Now (ρ) 57.039"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 200465 70818 21 02 21 +39 30 32 H 4 113 AB 2018 37 299 18.9 6.62 9.49 2.87
Show 70818 21 02 21 +39 30 32 H 4 113 AC 2012 10 248 26.7 6.62 12.50 5.88
Show 70818 21 02 21 +39 30 32 SMY 6 AD 2015 8 141 57.0 6.62 12.61 5.99 <===
Show 70818 21 02 21 +39 30 32 SMY 6 AE 2018 10 87 95.7 6.62 10.88 4.26
Show 70818 21 02 21 +39 30 32 WRD 4 AF 2015 5 223 101.8 6.62 12.45 5.83
Show 70818 21 02 21 +39 30 32 WRD 4 AG 1875 1 230 95.0 6.62 13.50 6.88
Show 70818 21 02 21 +39 30 32 FYM 114 AI 2012 3 277 41.1 6.62 15.20 8.58
Show 21 02 29 +39 30 38 WRD 4 ED 2015 7 230 77.7 10.88 12.61 1.73
Show 21 02 29 +39 30 38 WRD 4 EH 2015 9 159 37.4 10.88 12.84 1.96
Ninefold system
9 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus SAO 70818 HIP 103822 Tycho2 3172-01764-1
Gaia DR2 1872982701745880320 HD 200465 BD BD+38 4321 Distance 223.71
Distance ly 729.74