Astronomy
Constellations - Hydra - 15 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name15 Hya
Skymap Number8510107
Henry Draper (HD) Number75737
Harvard Revised (HR) Number3523
SAO Number136345
Durchmusterung (DM) NumberSD-06 2743
Washington Double Stars (WDS) Number
08516-0711
Positional Data
Position and Proper Motion (PPM) Number191777
Right Ascension (RA) J20008h 51m 34.411s
Declination (Dec) J2000-7° 10' 38.012"
Position Uncertainty0.0091s
Proper Motion in RA (J2000)/cos(Dec)-0.00328
Proper Motion in Dec (J2000)-0.005367
Radial Velocity+037.0km s-1
Trigonometric Parallax+0.00668s
Trigonometric Parallax Uncertainty0.00088s
GCI Unit Vector in X (J2000)-0.675303
GCI Unit Vector in Y (J2000)0.726881
GCI Unit Vector in Z (J2000)-0.124939
Galactic Longitude234.40°
Galactic Latitude
22.64°
Observational Data
Observed Visual Magnitude (V)5.57
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.006
Observed B Magnitude5.72
Observed B-V Colour+0.153
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 Magnitude6.0
Observed Photographic Magnitude5.7
Morgan Keenan (MK) Spectral TypeA4m
One-Dimensional Spectral ClassA2
Position Angle128
Year of Observation1980. 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