Astronomy
Constellations - Ursa Major - 50alp UMa (Dubhe)

 
Identification Data
Common NameDubhe
ConstellationUrsa Major
Star Name50alp UMa
Skymap Number11030125
Henry Draper (HD) Number95689
Harvard Revised (HR) Number4301
SAO Number15384
Durchmusterung (DM) NumberBD+62 1161
Washington Double Stars (WDS) Number
11037+6145
Positional Data
Position and Proper Motion (PPM) Number17705
Right Ascension (RA) J200011h 3m 43.668s
Declination (Dec) J2000+61° 45' 3.720"
Position Uncertainty0.0055s
Proper Motion in RA (J2000)/cos(Dec)-0.01922
Proper Motion in Dec (J2000)-0.035267
Radial Velocity-008.9km s-1
Trigonometric Parallax+0.02638s
Trigonometric Parallax Uncertainty0.00053s
GCI Unit Vector in X (J2000)-0.459108
GCI Unit Vector in Y (J2000)0.115048
GCI Unit Vector in Z (J2000)0.880899
Galactic Longitude142.84°
Galactic Latitude
51.01°
Observational Data
Observed Visual Magnitude (V)1.82
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude2.88
Observed B-V Colour+1.064
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 Magnitude2.0
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeK0-IIIa
One-Dimensional Spectral ClassK0
Position Angle
Year of Observation1991. 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 13:15:52 GMT+01:00 2001