20564+4308 COU2544

 
 
20h 56m 24.09s +43 07' 46.5" P.A. 167 sep 0.3 mag 8.98,9.88 Sp B0III: dist. 349.65 pc (1140.56 l.y.)
 
 
Coord 2000
20564+4308
Discov num
COU2544
Comp
Coord arcsec 2000
20 56 24.09 +43 07 46.5
Date first
1988
Date last
2011
Obs
7
Pa first
156
Pa last
167
P.A. Now (θ)
167°
Sep first
0.3
Sep last
0.3
Sep. Now (ρ)
0.3"
Mag pri
8.98
Mag sec
9.88
delta mag (ΔM)
0.9
Spectral class
B0III: (blue-white)
Pri motion ra
+006
Sec motion ra
Pri motion dec
-004
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
167.1
Precise sep
0.32
Constellation
Cygnus
SAO
50259
HIP
103355
Tycho2
3179-00476-1
BD
BD+42 3914
Distance
349.65
Distance ly
1140.56
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20564+4308 COU2544 1991 3 147 0.3 8.98 9.88 B0III: D 205624.09+430746.5
20564+4308 COU2544 2009 5 160 0.3 8.98 9.88 B0III: D 205624.09+430746.5
20564+4308 COU2544 2011 7 167 0.3 8.98 9.88 B0III: 205624.09+430746.5

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