20553+4231 STT 423

 
 
20h 55m 17.96s +42 30' 48.6" P.A. 76 sep 2.8 mag 7.12,9.64 Sp B9
 
 
Coord 2000
20553+4231
Discov num
STT 423
Comp
Coord arcsec 2000
20 55 17.96 +42 30 48.6
Date first
1853
Date last
2011
Obs
20
Pa first
75
Pa last
76
P.A. Now (θ)
76°
Sep first
2.8
Sep last
2.8
Sep. Now (ρ)
2.8"
Mag pri
7.12
Mag sec
9.64
delta mag (ΔM)
2.52
Spectral class
B9 (blue-white)
Pri motion ra
+000
Sec motion ra
Pri motion dec
+001
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
75.9
Precise sep
2.768
Constellation
Cygnus
Tycho2
3175-00170-1
HD
199355
last precise pa
75.9
last precise sep
2.768
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20553+4231 STT 423 2001 17 78 2.7 7.12 9.64 B9 205517.96+423048.6
20553+4231 STT 423 2006 18 76 2.8 7.12 9.64 B9 205517.96+423048.6
20553+4231 STT 423 2011 20 76 2.8 7.12 9.64 B9 205517.96+423048.6

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