20324+4118 HER   3AB (V729 Cyg)

 
 
20h 32m 22.42s +41 18' 18.9" P.A. 54 sep 0.9 mag 9.40,11.94 Sp O6.5Iab 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
2007
Obs
7
Pa first
65
Pa last
54
P.A. Now (θ)
54°
Sep first
1.5
Sep last
0.9
Sep. Now (ρ)
0.9"
Mag pri
9.40
Mag sec
11.94
delta mag (ΔM)
2.54
Spectral class
O6.5Iab (blue)
Pri motion ra
-001
Sec motion ra
-001
Pri motion dec
-006
Sec motion dec
-003
Notes
N (See Notes)
rPM=0.493
Nature of this double is uncertain.
 
 
20324+4118 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show V729 Cyg 20324+4118 HER 3 AB 1967 2007 7 54 0.9 9.40 11.94 2.54 <===
Show 20324+4118 MZA 25 AC 1998 2015 5 324 20.5 9.40 15.40 6.00
Show 20324+4118 MZA 25 AD 2003 2015 4 226 5.5 9.40 16.80 7.40
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
54.4
Precise sep
0.934
Var name
V729 Cyg
Constellation
Cygnus
HIP
101341
Tycho2
3161-01401-1
Gaia DR2
41174418048
BD
BD+40 4220
Distance
657.89
Distance ly
2146.04
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20324+4118 HER 3 AB 2007 6 54 0.9 9.40 11.94 O7e N 203222.42+411818.9

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