20339+4642 BU 1489AB (V2015 Cyg)

 
 
20h 33m 54.84s +46 41' 37.9" P.A. 16 sep 116.5 mag 5.75,9.35 Sp B9pSi dist. 132.28 pc (431.5 l.y.)
 
 
Coord 2000
20339+4642
Discov num
BU 1489
Comp
AB
Coord arcsec 2000
20 33 54.84 +46 41 37.9
Date first
1893
Date last
2012
Obs
13
Pa first
17
Pa last
16
P.A. Now (θ)
16°
Sep first
118.1
Sep last
116.5
Sep. Now (ρ)
116.5"
Mag pri
5.75
Mag sec
9.35
delta mag (ΔM)
3.6
Spectral class
B9pSi (blue-white)
Pri motion ra
+010
Sec motion ra
-002
Pri motion dec
+002
Sec motion dec
-003
Notes
N (See Notes)
rPM=1.275
This double is not physical.
 
 
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
16
Precise sep
116.53
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 BU 1489 AB 2002 10 17 117.5 5.75 9.35 B9pSi N 203354.84+464137.9
20339+4642 BU 1489 AB 2003 12 16 117.4 5.75 9.35 B9pSi N 203354.84+464137.9
20339+4642 BU 1489 AB 2012 13 16 116.5 5.75 9.35 B9pSi N 203354.84+464137.9

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