Astronomy
Constellations - Ursa Major - 85eta UMa (Alkaid)

 
Identification Data
Common NameAlkaid
ConstellationUrsa Major
Star Name85eta UMa
Skymap Number13470101
Henry Draper (HD) Number120315
Harvard Revised (HR) Number5191
SAO Number44752
Durchmusterung (DM) NumberBD+50 2027
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number53742
Right Ascension (RA) J200013h 47m 32.437s
Declination (Dec) J2000+49° 18' 47.754"
Position Uncertainty0.0067s
Proper Motion in RA (J2000)/cos(Dec)-0.01240
Proper Motion in Dec (J2000)-0.015666
Radial Velocity-013.4km s-1
Trigonometric Parallax+0.03239s
Trigonometric Parallax Uncertainty0.00074s
GCI Unit Vector in X (J2000)-0.581460
GCI Unit Vector in Y (J2000)-0.294802
GCI Unit Vector in Z (J2000)0.758285
Galactic Longitude100.68°
Galactic Latitude
65.32°
Observational Data
Observed Visual Magnitude (V)1.86
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.006
Observed B Magnitude1.76
Observed B-V Colour-0.102
Observed B Magnitude or (B-V) Magnitude Uncertainty0.007
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude1.9
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeB3V
One-Dimensional Spectral ClassB3
Position Angle
Year of Observation 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