Astronomy
Constellations - Hydra - 57 Hya

 
Identification Data
Common Name
ConstellationHydra
Star Name57 Hya
Skymap Number14470153
Henry Draper (HD) Number130274
Harvard Revised (HR) Number5517
SAO Number182883
Durchmusterung (DM) NumberCD-2610519
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number263410
Right Ascension (RA) J200014h 47m 57.557s
Declination (Dec) J2000-26° 38' 46.157"
Position Uncertainty0.0096s
Proper Motion in RA (J2000)/cos(Dec)-0.00079
Proper Motion in Dec (J2000)-0.008866
Radial Velocity+006.0km s-1
Trigonometric Parallax+0.00751s
Trigonometric Parallax Uncertainty0.00085s
GCI Unit Vector in X (J2000)-0.664324
GCI Unit Vector in Y (J2000)-0.597946
GCI Unit Vector in Z (J2000)-0.448479
Galactic Longitude332.89°
Galactic Latitude
29.36°
Observational Data
Observed Visual Magnitude (V)5.77
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude5.76
Observed B-V Colour-0.010
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 Magnitude6.0
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeB9V
One-Dimensional Spectral ClassB9
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