Astronomy
Constellations - Libra - 40tau Lib

 
Identification Data
Common Name
ConstellationLibra
Star Name40tau Lib
Skymap Number15380091
Henry Draper (HD) Number139365
Harvard Revised (HR) Number5812
SAO Number183649
Durchmusterung (DM) NumberCD-2911837
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number264487
Right Ascension (RA) J200015h 38m 39.369s
Declination (Dec) J2000-29° 46' 39.914"
Position Uncertainty0.0105s
Proper Motion in RA (J2000)/cos(Dec)-0.00170
Proper Motion in Dec (J2000)-0.026566
Radial Velocity+003.2km s-1
Trigonometric Parallax+0.00733s
Trigonometric Parallax Uncertainty0.00101s
GCI Unit Vector in X (J2000)-0.502001
GCI Unit Vector in Y (J2000)-0.708059
GCI Unit Vector in Z (J2000)-0.496637
Galactic Longitude341.07°
Galactic Latitude
20.45°
Observational Data
Observed Visual Magnitude (V)3.66
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude3.50
Observed B-V Colour-0.159
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 Magnitude3.8
Observed Photographic Magnitude3.6
Morgan Keenan (MK) Spectral TypeB2.5V
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))

 
Page compiled: Sun Sep 02 13:15:44 GMT+01:00 2001