Astronomy
Constellations - Hydra - 28 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name28 Hya
Skymap Number9250086
Henry Draper (HD) Number81420
Harvard Revised (HR) Number3738
SAO Number136832
Durchmusterung (DM) NumberSD-04 2616
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number192352
Right Ascension (RA) J20009h 25m 24.035s
Declination (Dec) J2000-5° 7' 2.617"
Position Uncertainty0.0112s
Proper Motion in RA (J2000)/cos(Dec)-0.00078
Proper Motion in Dec (J2000)-0.006166
Radial Velocity+005.3km s-1
Trigonometric Parallax+0.00483s
Trigonometric Parallax Uncertainty0.00089s
GCI Unit Vector in X (J2000)-0.777864
GCI Unit Vector in Y (J2000)0.622070
GCI Unit Vector in Z (J2000)-0.089197
Galactic Longitude237.85°
Galactic Latitude
30.73°
Observational Data
Observed Visual Magnitude (V)5.58
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.005
Observed B Magnitude7.09
Observed B-V Colour+1.512
Observed B Magnitude or (B-V) Magnitude Uncertainty0.009
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude5.8
Observed Photographic Magnitude7.0
Morgan Keenan (MK) Spectral TypeK5III
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