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Astronomy
Constellations - Grus - tau1Gru

 
Identification Data
Common Name
ConstellationGrus
Star Nametau1Gru
Skymap Number22530086
Henry Draper (HD) Number216435
Harvard Revised (HR) Number8700
SAO Number231343
Durchmusterung (DM) NumberCD-4913988
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number328720
Right Ascension (RA) J200022h 53m 37.931s
Declination (Dec) J2000-48° 35' 53.828"
Position Uncertainty0.0063s
Proper Motion in RA (J2000)/cos(Dec)+0.02185
Proper Motion in Dec (J2000)-0.081566
Radial Velocity-001.0km s-1
Trigonometric Parallax+0.03004s
Trigonometric Parallax Uncertainty0.00073s
GCI Unit Vector in X (J2000)0.633798
GCI Unit Vector in Y (J2000)-0.188847
GCI Unit Vector in Z (J2000)-0.750091
Galactic Longitude341.70°
Galactic Latitude
-58.71°
Observational Data
Observed Visual Magnitude (V)6.03
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude6.65
Observed B-V Colour+0.624
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 Magnitude6.2
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeG0V
One-Dimensional Spectral ClassG5
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))

 
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Page compiled: Sun Sep 02 13:15:41 GMT+01:00 2001
 
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