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Astronomy
Constellations - Centaurus - eta Cen

 
Identification Data
Common Name
ConstellationCentaurus
Star Nameeta Cen
Skymap Number14350082
Henry Draper (HD) Number127972
Harvard Revised (HR) Number5440
SAO Number225044
Durchmusterung (DM) NumberCD-41 8917
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number319680
Right Ascension (RA) J200014h 35m 30.423s
Declination (Dec) J2000-42° 9' 28.168"
Position Uncertainty0.0090s
Proper Motion in RA (J2000)/cos(Dec)-0.00318
Proper Motion in Dec (J2000)-0.032466
Radial Velocity-000.2km s-1
Trigonometric Parallax+0.01057s
Trigonometric Parallax Uncertainty0.00083s
GCI Unit Vector in X (J2000)-0.577099
GCI Unit Vector in Y (J2000)-0.465274
GCI Unit Vector in Z (J2000)-0.671175
Galactic Longitude322.78°
Galactic Latitude
16.67°
Observational Data
Observed Visual Magnitude (V)2.34
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.004
Observed B Magnitude2.18
Observed B-V Colour-0.160
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 Magnitude2.7
Observed Photographic Magnitude2.5
Morgan Keenan (MK) Spectral TypeB1.5Vne
One-Dimensional Spectral ClassB3
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 13:15:36 GMT+01:00 2001
 
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