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Astronomy
Constellations - Virgo - 20 Vir

 
Identification Data
Common Name
ConstellationVirgo
Star Name20 Vir
Skymap Number12330004
Henry Draper (HD) Number109217
Harvard Revised (HR) Number4777
SAO Number100146
Durchmusterung (DM) NumberBD+11 2473
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number129139
Right Ascension (RA) J200012h 33m 2.879s
Declination (Dec) J2000+10° 17' 44.416"
Position Uncertainty0.0090s
Proper Motion in RA (J2000)/cos(Dec)-0.00340
Proper Motion in Dec (J2000)+0.004366
Radial Velocity+000.5km s-1
Trigonometric Parallax+0.00692s
Trigonometric Parallax Uncertainty0.00085s
GCI Unit Vector in X (J2000)-0.973687
GCI Unit Vector in Y (J2000)-0.141386
GCI Unit Vector in Z (J2000)0.178728
Galactic Longitude287.66°
Galactic Latitude
72.62°
Observational Data
Observed Visual Magnitude (V)6.29
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.004
Observed B Magnitude7.23
Observed B-V Colour+0.942
Observed B Magnitude or (B-V) Magnitude Uncertainty0.006
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude6.5
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeG8III
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))

 
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Page compiled: Sun Sep 02 13:15:52 GMT+01:00 2001
 
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