Astronomy
Constellations - Hydra - 51 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name51 Hya
Skymap Number14230019
Henry Draper (HD) Number125932
Harvard Revised (HR) Number5381
SAO Number182483
Durchmusterung (DM) NumberCD-27 9803
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number262841
Right Ascension (RA) J200014h 23m 5.774s
Declination (Dec) J2000-27° 45' 14.463"
Position Uncertainty0.0082s
Proper Motion in RA (J2000)/cos(Dec)-0.01519
Proper Motion in Dec (J2000)-0.116666
Radial Velocity+020.4km s-1
Trigonometric Parallax+0.01867s
Trigonometric Parallax Uncertainty0.00076s
GCI Unit Vector in X (J2000)-0.717989
GCI Unit Vector in Y (J2000)-0.517336
GCI Unit Vector in Z (J2000)-0.465677
Galactic Longitude326.61°
Galactic Latitude
30.87°
Observational Data
Observed Visual Magnitude (V)4.79
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude6.11
Observed B-V Colour+1.317
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 Magnitude4.3
Observed Photographic Magnitude
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))

 
Page compiled: Sun Sep 02 13:15:43 GMT+01:00 2001