20095+4752 BLL  45 (SV Cyg)

 
 
20h 09m 30.09s +47 52' 17.2" P.A. 140.00 sep 145.4 mag 9.01,9.92 Sp N dist. 980.39 pc (3198.03 l.y.)
 
 
Coord 2000
20095+4752
Discov num
BLL  45
Comp
Coord arcsec 2000
20 09 30.09 +47 52 17.2
Date first
1879
Date last
2019
Obs
15
Pa first
140
Pa last
140
P.A. Now (θ)
140°
Sep first
145.2
Sep last
145.4
Sep. Now (ρ)
145.4"
Mag pri
9.01
Mag sec
9.92
delta mag (ΔM)
0.91
Spectral class
N (deep red)
Pri motion ra
-001
Sec motion ra
-011
Pri motion dec
-004
Sec motion dec
-008
Notes
N (See Notes)
Visually invisible, K-band or other infrared star rPM=0.792
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
139.5
Precise sep
145.37
Var name
SV Cyg
Constellation
Cygnus
HIP
99310
Tycho2
3563-00462-1
Gaia DR2
82641906816
HD
191738
BD
BD+47 3031
Distance
980.39
Distance ly
3198.03
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20095+4752 BLL 45 2004 7 139 145.2 9.01 9.92 N N 200930.09+475217.2
20095+4752 BLL 45 2010 10 139 145.0 9.01 9.92 N N 200930.09+475217.2
20095+4752 BLL 45 2015 11 139 144.9 9.01 9.92 N N 200930.09+475217.2
20095+4752 BLL 45 2019 15 140 145.4 9.01 9.92 N N 200930.09+475217.2

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