Astronomy
Constellations - Octans - tau Oct

 
Identification Data
Common Name
ConstellationOctans
Star Nametau Oct
Skymap Number23270080
Henry Draper (HD) Number219765
Harvard Revised (HR) Number8862
SAO Number258970
Durchmusterung (DM) NumberCP-88 204
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number378842
Right Ascension (RA) J200023h 28m 3.783s
Declination (Dec) J2000-87° 28' 55.970"
Position Uncertainty0.0061s
Proper Motion in RA (J2000)/cos(Dec)+0.02472
Proper Motion in Dec (J2000)+0.011566
Radial Velocity+031.0km s-1
Trigonometric Parallax+0.00624s
Trigonometric Parallax Uncertainty0.00052s
GCI Unit Vector in X (J2000)0.043504
GCI Unit Vector in Y (J2000)-0.006102
GCI Unit Vector in Z (J2000)-0.999035
Galactic Longitude303.96°
Galactic Latitude
-29.48°
Observational Data
Observed Visual Magnitude (V)5.50
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude6.79
Observed B-V Colour+1.288
Observed B Magnitude or (B-V) Magnitude Uncertainty0.004
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude5.6
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeK2III
One-Dimensional Spectral ClassK0
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 13:15:45 GMT+01:00 2001