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Astronomy
Constellations - Hercules - 22tau Her

 
Identification Data
Common Name
ConstellationHercules
Star Name22tau Her
Skymap Number16190133
Henry Draper (HD) Number147394
Harvard Revised (HR) Number6092
SAO Number46028
Durchmusterung (DM) NumberBD+46 2169
Washington Double Stars (WDS) Number
16197+4619
Positional Data
Position and Proper Motion (PPM) Number55342
Right Ascension (RA) J200016h 19m 44.436s
Declination (Dec) J2000+46° 18' 48.119"
Position Uncertainty0.0061s
Proper Motion in RA (J2000)/cos(Dec)-0.00127
Proper Motion in Dec (J2000)+0.039366
Radial Velocity-015.3km s-1
Trigonometric Parallax+0.01037s
Trigonometric Parallax Uncertainty0.00053s
GCI Unit Vector in X (J2000)-0.292617
GCI Unit Vector in Y (J2000)-0.625668
GCI Unit Vector in Z (J2000)0.723128
Galactic Longitude72.48°
Galactic Latitude
45.04°
Observational Data
Observed Visual Magnitude (V)3.90
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude3.76
Observed B-V Colour-0.140
Observed B Magnitude or (B-V) Magnitude Uncertainty0.002
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude3.9
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeB5IV
One-Dimensional Spectral ClassB5
Position Angle146
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))

 
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Page compiled: Sun Sep 02 13:15:41 GMT+01:00 2001
 
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