Astronomy
Constellations - Cygnus - 31 Cyg

 
Identification Data
Common Name
ConstellationCygnus
Star Name31 Cyg
Skymap Number20130155
Henry Draper (HD) Number192577
Harvard Revised (HR) Number7735
SAO Number49337
Durchmusterung (DM) NumberBD+46 2882
Washington Double Stars (WDS) Number
20136+4644
Positional Data
Position and Proper Motion (PPM) Number59524
Right Ascension (RA) J200020h 13m 37.906s
Declination (Dec) J2000+46° 44' 28.783"
Position Uncertainty0.0082s
Proper Motion in RA (J2000)/cos(Dec)+0.00041
Proper Motion in Dec (J2000)+0.001966
Radial Velocity-006.9km s-1
Trigonometric Parallax+0.00241s
Trigonometric Parallax Uncertainty0.00057s
GCI Unit Vector in X (J2000)0.377320
GCI Unit Vector in Y (J2000)-0.572063
GCI Unit Vector in Z (J2000)0.728267
Galactic Longitude82.68°
Galactic Latitude
6.78°
Observational Data
Observed Visual Magnitude (V)3.81
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude5.00
Observed B-V Colour+1.188
Observed B Magnitude or (B-V) Magnitude Uncertainty0.003
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.0
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeK2II+B3V
One-Dimensional Spectral ClassK0
Position Angle173
Year of Observation1926. 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