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Astronomy
Constellations - Hydra - 6 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name6 Hya
Skymap Number8400006
Henry Draper (HD) Number73840
Harvard Revised (HR) Number3431
SAO Number154515
Durchmusterung (DM) NumberSD-11 2420
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number220446
Right Ascension (RA) J20008h 40m 1.471s
Declination (Dec) J2000-12° 28' 31.340"
Position Uncertainty0.0085s
Proper Motion in RA (J2000)/cos(Dec)-0.00545
Proper Motion in Dec (J2000)+0.000966
Radial Velocity-010.6km s-1
Trigonometric Parallax+0.00778s
Trigonometric Parallax Uncertainty0.00082s
GCI Unit Vector in X (J2000)-0.627691
GCI Unit Vector in Y (J2000)0.747890
GCI Unit Vector in Z (J2000)-0.216020
Galactic Longitude237.41°
Galactic Latitude
17.34°
Observational Data
Observed Visual Magnitude (V)4.97
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude6.38
Observed B-V Colour+1.409
Observed B Magnitude or (B-V) Magnitude Uncertainty0.005
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude5.2
Observed Photographic Magnitude6.2
Morgan Keenan (MK) Spectral TypeK4III
One-Dimensional Spectral ClassK2
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 13:15:42 GMT+01:00 2001
 
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