Astronomy
Constellations - Cygnus - 55 Cyg

 
Identification Data
Common Name
ConstellationCygnus
Star Name55 Cyg
Skymap Number20480213
Henry Draper (HD) Number198478
Harvard Revised (HR) Number7977
SAO Number50099
Durchmusterung (DM) NumberBD+45 3291
Washington Double Stars (WDS) Number
20489+4607
Positional Data
Position and Proper Motion (PPM) Number60515
Right Ascension (RA) J200020h 48m 56.290s
Declination (Dec) J2000+46° 6' 50.884"
Position Uncertainty0.0068s
Proper Motion in RA (J2000)/cos(Dec)-0.00028
Proper Motion in Dec (J2000)-0.002666
Radial Velocity-007.2km s-1
Trigonometric Parallax+0.00145s
Trigonometric Parallax Uncertainty0.00055s
GCI Unit Vector in X (J2000)0.465962
GCI Unit Vector in Y (J2000)-0.513263
GCI Unit Vector in Z (J2000)0.720722
Galactic Longitude85.76°
Galactic Latitude
1.49°
Observational Data
Observed Visual Magnitude (V)4.86
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.20
Observed B-V Colour+0.339
Observed B Magnitude or (B-V) Magnitude Uncertainty0.004
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.9
Observed Photographic Magnitude4.7
Morgan Keenan (MK) Spectral TypeB3Ia
One-Dimensional Spectral ClassB2
Position Angle174
Year of Observation1934. AD

Data Source
SKY2000 - Master Star Catalog - Star Catalog Database, Version 2
    Sande C.B., Warren Jr. W.H., Tracewell D.A., Home A.T., Miller A.C.
    (Goddard Space Flight Center, Flight Dynamics Division (1998))

 
Page compiled: Sun Sep 02 13:15:39 GMT+01:00 2001