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Astronomy
Constellations - Hydrus - tau1Hyi

 
Identification Data
Common Name
ConstellationHydrus
Star Nametau1Hyi
Skymap Number1410052
Henry Draper (HD) Number10859
Harvard Revised (HR) Number516
SAO Number255806
Durchmusterung (DM) NumberCP-79 44
Washington Double Stars (WDS) Number
01414-7909
Positional Data
Position and Proper Motion (PPM) Number367365
Right Ascension (RA) J20001h 41m 21.470s
Declination (Dec) J2000-79° 8' 53.520"
Position Uncertainty0.0083s
Proper Motion in RA (J2000)/cos(Dec)+0.02116
Proper Motion in Dec (J2000)+0.022167
Radial Velocity+002.km s-1
Trigonometric Parallax+0.00826s
Trigonometric Parallax Uncertainty0.00063s
GCI Unit Vector in X (J2000)0.170156
GCI Unit Vector in Y (J2000)0.080576
GCI Unit Vector in Z (J2000)-0.982117
Galactic Longitude299.99°
Galactic Latitude
-37.69°
Observational Data
Observed Visual Magnitude (V)6.35
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.004
Observed B Magnitude7.29
Observed B-V Colour+0.944
Observed B Magnitude or (B-V) Magnitude Uncertainty0.006
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude6.5
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeG6-8III
One-Dimensional Spectral ClassK0
Position Angle349
Year of Observation1918. 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 13:15:43 GMT+01:00 2001
 
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