Astronomy
Constellations - Hydra - 23 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name23 Hya
Skymap Number9160126
Henry Draper (HD) Number79910
Harvard Revised (HR) Number3681
SAO Number136725
Durchmusterung (DM) NumberSD-05 2762
Washington Double Stars (WDS) Number
09167-0621
Positional Data
Position and Proper Motion (PPM) Number192210
Right Ascension (RA) J20009h 16m 41.736s
Declination (Dec) J2000-6° 21' 11.320"
Position Uncertainty0.0294s
Proper Motion in RA (J2000)/cos(Dec)+0.00167
Proper Motion in Dec (J2000)+0.004366
Radial Velocity-007.8km s-1
Trigonometric Parallax+0.01170s
Trigonometric Parallax Uncertainty0.00100s
GCI Unit Vector in X (J2000)-0.752050
GCI Unit Vector in Y (J2000)0.649750
GCI Unit Vector in Z (J2000)-0.110656
Galactic Longitude237.55°
Galactic Latitude
28.25°
Observational Data
Observed Visual Magnitude (V)5.23
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude6.41
Observed B-V Colour+1.182
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 Magnitude5.4
Observed Photographic Magnitude6.4
Morgan Keenan (MK) Spectral TypeK2III
One-Dimensional Spectral ClassK0
Position Angle282
Year of Observation1959. 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