20324+4118 HER 3 AB (V729 Cyg)

 
 
20h 32m 22.42s +41 18' 18.9" P.A. 55.00 sep 0.9 mag 9.40,11.94 Sp O7I+O7I dist. 657.89 pc (2146.04 l.y.)
 
 
Coord 2000 20324+4118 Discov num HER   3 Comp AB Coord arcsec 2000 20 32 22.42 +41 18 18.9
Date first 1967 Date last 2018 Obs 11
Pa first 65 Pa last 55.2 P.A. Now (θ) 55.2°
Sep first 1.5 Sep last 0.932 Sep. Now (ρ) 0.932"
Mag pri 9.40 Mag sec 11.94 delta mag (ΔM) 2.54 Spectral class O7I+O7I (blue/blue)
Pri motion ra -001 Sec motion ra -001
Pri motion dec -006 Sec motion dec -003
Notes N V (See Notes, Proper motion indicates physical)
rPM=0.493
This double is physical.
 
 
20324+4118 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 32 22 +41 18 19 CIA 33 Aa,Ab 2019 2 107 0.0 4.70 6.30 1.60
Show 20 32 22 +41 18 19 CIA 33 Aa,Ac 2019 1 275 0.0 4.70 8.60 3.90
Show V729 Cyg 20 32 22 +41 18 19 HER 3 AB 2018 11 55 0.9 9.40 11.94 2.54 <===
Show 20 32 22 +41 18 19 MZA 25 AC 2015 9 324 20.5 9.40 15.40 6.00
Show 20 32 22 +41 18 19 MZA 25 AD 2015 5 226 5.5 9.40 16.80 7.40
Sextuple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name V729 Cyg Constellation Cygnus HIP 101341 Tycho2 3161-01401-1
Gaia DR2 2067830941174418048 BD BD+40 4220 Distance 657.89 Distance ly 2146.04