Astronomy
Constellations - Hercules - 42 Her

 
Identification Data
Common Name
ConstellationHercules
Star Name42 Her
Skymap Number16380132
Henry Draper (HD) Number150450
Harvard Revised (HR) Number6200
SAO Number46210
Durchmusterung (DM) NumberBD+49 2531
Washington Double Stars (WDS) Number
16387+4856
Positional Data
Position and Proper Motion (PPM) Number55566
Right Ascension (RA) J200016h 38m 44.845s
Declination (Dec) J2000+48° 55' 42.033"
Position Uncertainty0.0060s
Proper Motion in RA (J2000)/cos(Dec)-0.00488
Proper Motion in Dec (J2000)+0.026866
Radial Velocity-055.2km s-1
Trigonometric Parallax+0.00867s
Trigonometric Parallax Uncertainty0.00046s
GCI Unit Vector in X (J2000)-0.228079
GCI Unit Vector in Y (J2000)-0.616143
GCI Unit Vector in Z (J2000)0.753888
Galactic Longitude75.61°
Galactic Latitude
41.58°
Observational Data
Observed Visual Magnitude (V)4.88
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude6.43
Observed B-V Colour+1.547
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 Magnitude5.1
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeM2.5IIIab
One-Dimensional Spectral ClassM0
Position Angle92
Year of Observation1958. 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 13:15:41 GMT+01:00 2001