Astronomy
Constellations - Canis Major - 30tau CMa

 
Identification Data
Common Name
ConstellationCanis Major
Star Name30tau CMa
Skymap Number7180189
Henry Draper (HD) Number57061
Harvard Revised (HR) Number2782
SAO Number173446
Durchmusterung (DM) NumberCD-24 5176
Washington Double Stars (WDS) Number
07187-2457
Positional Data
Position and Proper Motion (PPM) Number252114
Right Ascension (RA) J20007h 18m 42.480s
Declination (Dec) J2000-24° 57' 15.707"
Position Uncertainty0.0086s
Proper Motion in RA (J2000)/cos(Dec)-0.00013
Proper Motion in Dec (J2000)+0.003767
Radial Velocity+040.4km s-1
Trigonometric Parallax+0.00102s
Trigonometric Parallax Uncertainty0.00071s
GCI Unit Vector in X (J2000)-0.305283
GCI Unit Vector in Y (J2000)0.853701
GCI Unit Vector in Z (J2000)-0.421896
Galactic Longitude238.19°
Galactic Latitude
-5.54°
Observational Data
Observed Visual Magnitude (V)4.40
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude4.23
Observed B-V Colour-0.166
Observed B Magnitude or (B-V) Magnitude Uncertainty0.002
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.4
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeO9Ib
One-Dimensional Spectral ClassOe5
Position Angle75
Year of Observation1960. 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 13:15:35 GMT+01:00 2001