Astronomy
Constellations - Hercules - 57 Her

 
Identification Data
Common Name
ConstellationHercules
Star Name57 Her
Skymap Number16570088
Henry Draper (HD) Number153287
Harvard Revised (HR) Number6305
SAO Number84720
Durchmusterung (DM) NumberBD+25 3166
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number105381
Right Ascension (RA) J200016h 57m 31.046s
Declination (Dec) J2000+25° 21' 10.228"
Position Uncertainty0.0062s
Proper Motion in RA (J2000)/cos(Dec)+0.00059
Proper Motion in Dec (J2000)+0.015966
Radial Velocity+008.6km s-1
Trigonometric Parallax+0.00587s
Trigonometric Parallax Uncertainty0.00064s
GCI Unit Vector in X (J2000)-0.243333
GCI Unit Vector in Y (J2000)-0.870311
GCI Unit Vector in Z (J2000)0.428191
Galactic Longitude46.01°
Galactic Latitude
35.36°
Observational Data
Observed Visual Magnitude (V)6.27
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude7.17
Observed B-V Colour+0.903
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 Magnitude6.7
Observed Photographic Magnitude7.7
Morgan Keenan (MK) Spectral TypegG5
One-Dimensional Spectral ClassK0
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