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Astronomy
Constellations - Leo - 81 Leo

 
Identification Data
Common Name
ConstellationLeo
Star Name81 Leo
Skymap Number11250099
Henry Draper (HD) Number99285
Harvard Revised (HR) Number4408
SAO Number99601
Durchmusterung (DM) NumberBD+17 2356
Washington Double Stars (WDS) Number
11256+1627
Positional Data
Position and Proper Motion (PPM) Number128245
Right Ascension (RA) J200011h 25m 36.373s
Declination (Dec) J2000+16° 27' 23.539"
Position Uncertainty0.0084s
Proper Motion in RA (J2000)/cos(Dec)-0.00981
Proper Motion in Dec (J2000)-0.004966
Radial Velocity+017.9km s-1
Trigonometric Parallax+0.02115s
Trigonometric Parallax Uncertainty0.00080s
GCI Unit Vector in X (J2000)-0.948256
GCI Unit Vector in Y (J2000)0.143384
GCI Unit Vector in Z (J2000)0.283288
Galactic Longitude236.77°
Galactic Latitude
67.45°
Observational Data
Observed Visual Magnitude (V)5.58
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.004
Observed B Magnitude5.95
Observed B-V Colour+0.374
Observed B Magnitude or (B-V) Magnitude Uncertainty0.005
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude5.6
Observed Photographic Magnitude5.8
Morgan Keenan (MK) Spectral TypeF2V
One-Dimensional Spectral ClassF2
Position Angle351
Year of Observation1924. 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))

 
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Page compiled: Sun Sep 02 13:15:44 GMT+01:00 2001
 
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