Astronomy
Constellations - Centaurus - tau Cen

 
Identification Data
Common Name
ConstellationCentaurus
Star Nametau Cen
Skymap Number12370083
Henry Draper (HD) Number109787
Harvard Revised (HR) Number4802
SAO Number223560
Durchmusterung (DM) NumberCD-47 7745
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number317627
Right Ascension (RA) J200012h 37m 42.163s
Declination (Dec) J2000-48° 32' 28.694"
Position Uncertainty0.0059s
Proper Motion in RA (J2000)/cos(Dec)-0.01879
Proper Motion in Dec (J2000)-0.006566
Radial Velocity+005.0km s-1
Trigonometric Parallax+0.02477s
Trigonometric Parallax Uncertainty0.00069s
GCI Unit Vector in X (J2000)-0.653141
GCI Unit Vector in Y (J2000)-0.108428
GCI Unit Vector in Z (J2000)-0.749433
Galactic Longitude300.60°
Galactic Latitude
14.27°
Observational Data
Observed Visual Magnitude (V)3.85
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude3.90
Observed B-V Colour+0.054
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 Magnitude4.0
Observed Photographic Magnitude4.1
Morgan Keenan (MK) Spectral TypeA2V
One-Dimensional Spectral ClassA2
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 13:15:36 GMT+01:00 2001