Astronomy
Constellations - Ursa Major - 77eps UMa (Alioth)

 
Identification Data
Common NameAlioth
ConstellationUrsa Major
Star Name77eps UMa
Skymap Number12540004
Henry Draper (HD) Number112185
Harvard Revised (HR) Number4905
SAO Number28553
Durchmusterung (DM) NumberBD+56 1627
Washington Double Stars (WDS) Number
12540+5558
Positional Data
Position and Proper Motion (PPM) Number33769
Right Ascension (RA) J200012h 54m 1.749s
Declination (Dec) J2000+55° 57' 35.356"
Position Uncertainty0.0059s
Proper Motion in RA (J2000)/cos(Dec)+0.01331
Proper Motion in Dec (J2000)-0.009066
Radial Velocity-009.3km s-1
Trigonometric Parallax+0.04030s
Trigonometric Parallax Uncertainty0.00062s
GCI Unit Vector in X (J2000)-0.544291
GCI Unit Vector in Y (J2000)-0.130746
GCI Unit Vector in Z (J2000)0.828645
Galactic Longitude122.18°
Galactic Latitude
61.16°
Observational Data
Observed Visual Magnitude (V)1.76
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.005
Observed B Magnitude1.80
Observed B-V Colour+0.041
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 Magnitude1.7
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeA0pCr
One-Dimensional Spectral ClassA0
Position Angle94
Year of Observation1975. 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