Astronomy
Constellations - Hydra - 27 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name27 Hya
Skymap Number9200090
Henry Draper (HD) Number80586
Harvard Revised (HR) Number3709
SAO Number136768
Durchmusterung (DM) NumberSD-08 2643
Washington Double Stars (WDS) Number
09205-0933
Positional Data
Position and Proper Motion (PPM) Number192278
Right Ascension (RA) J20009h 20m 29.018s
Declination (Dec) J2000-9° 33' 20.501"
Position Uncertainty0.0094s
Proper Motion in RA (J2000)/cos(Dec)-0.00091
Proper Motion in Dec (J2000)-0.026866
Radial Velocity+024.5km s-1
Trigonometric Parallax+0.01339s
Trigonometric Parallax Uncertainty0.00082s
GCI Unit Vector in X (J2000)-0.756751
GCI Unit Vector in Y (J2000)0.632273
GCI Unit Vector in Z (J2000)-0.166006
Galactic Longitude241.09°
Galactic Latitude
27.11°
Observational Data
Observed Visual Magnitude (V)4.81
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude5.74
Observed B-V Colour+0.928
Observed B Magnitude or (B-V) Magnitude Uncertainty0.003
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.1
Observed Photographic Magnitude5.8
Morgan Keenan (MK) Spectral TypeG8III-IV+F5V
One-Dimensional Spectral ClassG5
Position Angle211
Year of Observation1963. 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