20339+4642 HDS2940Aa,Ab

 
 
20h 33m 54.84s +46 41' 37.9" P.A. 46 sep 0.3 mag 5.76,9.48 Sp B9sp... dist. 132.28 pc (431.5 l.y.)
 
 
Coord 2000
20339+4642
Discov num
HDS2940
Comp
Aa,Ab
Coord arcsec 2000
20 33 54.84 +46 41 37.9
Date first
1991
Date last
2009
Obs
8
Pa first
56
Pa last
46
P.A. Now (θ)
46°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.3"
Mag pri
5.76
Mag sec
9.48
delta mag (ΔM)
3.72
Spectral class
B9sp... (blue-white)
Pri motion ra
+010
Sec motion ra
Pri motion dec
+002
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
20339+4642 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49804 20339+4642 HDS2940 Aa,Ab 1991 2009 8 46 0.3 5.76 9.48 3.72 <===
Show V2015 Cyg 49804 20339+4642 BU 1489 AB 1893 2012 13 16 116.5 5.75 9.35 3.60
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
45.6
Precise sep
0.279
Var name
V2015 Cyg
Constellation
Cygnus
SAO
49804
HIP
101475
Tycho2
3573-01361-1
Gaia DR2
98315555584
HD
196178
HR
7870
BD
BD+46 2977
Distance
132.28
Distance ly
431.5
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20339+4642 HDS2940 Aa,Ab 1996 5 60 0.3 5.76 9.48 B9sp... D 203354.84+464137.9
20339+4642 HDS2940 Aa,Ab 2009 7 46 0.3 5.76 9.48 B9sp... N 203354.84+464137.9

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