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Astronomy
Constellations - Canis Major - 9alp CMa (Sirius)

 
Identification Data
Common NameSirius
ConstellationCanis Major
Star Name9alp CMa
Skymap Number6450045
Henry Draper (HD) Number48915
Harvard Revised (HR) Number2491
SAO Number151881
Durchmusterung (DM) NumberSD-16 1591
Washington Double Stars (WDS) Number
06451-1643
Positional Data
Position and Proper Motion (PPM) Number217626
Right Ascension (RA) J20006h 45m 8.917s
Declination (Dec) J2000-16° 42' 58.017"
Position Uncertainty0.0160s
Proper Motion in RA (J2000)/cos(Dec)-0.03801
Proper Motion in Dec (J2000)-1.223166
Radial Velocity-007.6km s-1
Trigonometric Parallax+0.37922s
Trigonometric Parallax Uncertainty0.00158s
GCI Unit Vector in X (J2000)-0.187455
GCI Unit Vector in Y (J2000)0.939218
GCI Unit Vector in Z (J2000)-0.287630
Galactic Longitude227.22°
Galactic Latitude
-8.88°
Observational Data
Observed Visual Magnitude (V)-1.44
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty
Observed B Magnitude-1.43
Observed B-V Colour+0.009
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 Magnitude-1.6
Observed Photographic Magnitude-1.6
Morgan Keenan (MK) Spectral TypeA1Vm
One-Dimensional Spectral ClassA0
Position Angle
Year of Observation1981. 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 13:15:34 GMT+01:00 2001
 
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