Astronomy
Constellations - Ursa Major - 81 UMa

 
Identification Data
Common Name
ConstellationUrsa Major
Star Name81 UMa
Skymap Number13340013
Henry Draper (HD) Number118214
Harvard Revised (HR) Number5109
SAO Number28803
Durchmusterung (DM) NumberBD+56 1667
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number34094
Right Ascension (RA) J200013h 34m 7.305s
Declination (Dec) J2000+55° 20' 54.361"
Position Uncertainty0.0059s
Proper Motion in RA (J2000)/cos(Dec)-0.00219
Proper Motion in Dec (J2000)-0.006666
Radial Velocity-007.0km s-1
Trigonometric Parallax+0.01177s
Trigonometric Parallax Uncertainty0.00055s
GCI Unit Vector in X (J2000)-0.521305
GCI Unit Vector in Y (J2000)-0.226999
GCI Unit Vector in Z (J2000)0.822625
Galactic Longitude110.48°
Galactic Latitude
60.74°
Observational Data
Observed Visual Magnitude (V)5.60
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.004
Observed B Magnitude5.58
Observed B-V Colour-0.017
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 Magnitude5.5
Observed Photographic Magnitude5.5
Morgan Keenan (MK) Spectral TypeA0V
One-Dimensional Spectral ClassA0
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