Astronomy
Constellations - Hydra - 42mu Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name42mu Hya
Skymap Number10260019
Henry Draper (HD) Number90432
Harvard Revised (HR) Number4094
SAO Number155980
Durchmusterung (DM) NumberSD-16 3052
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number222953
Right Ascension (RA) J200010h 26m 5.426s
Declination (Dec) J2000-16° 50' 10.646"
Position Uncertainty0.0097s
Proper Motion in RA (J2000)/cos(Dec)-0.00895
Proper Motion in Dec (J2000)-0.080166
Radial Velocity+039.6km s-1
Trigonometric Parallax+0.01314s
Trigonometric Parallax Uncertainty0.00079s
GCI Unit Vector in X (J2000)-0.877902
GCI Unit Vector in Y (J2000)0.381311
GCI Unit Vector in Z (J2000)-0.289638
Galactic Longitude260.00°
Galactic Latitude
33.65°
Observational Data
Observed Visual Magnitude (V)3.82
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.30
Observed B-V Colour+1.478
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 Magnitude4.1
Observed Photographic Magnitude5.2
Morgan Keenan (MK) Spectral TypeK4+III
One-Dimensional Spectral ClassK5
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 13:15:42 GMT+01:00 2001