Astronomy
Constellations - Libra - 31eps Lib

 
Identification Data
Common Name
ConstellationLibra
Star Name31eps Lib
Skymap Number15240035
Henry Draper (HD) Number137052
Harvard Revised (HR) Number5723
SAO Number159234
Durchmusterung (DM) NumberSD-09 4138
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number230189
Right Ascension (RA) J200015h 24m 11.889s
Declination (Dec) J2000-10° 19' 20.157"
Position Uncertainty0.0164s
Proper Motion in RA (J2000)/cos(Dec)-0.00464
Proper Motion in Dec (J2000)-0.152766
Radial Velocity-009.7km s-1
Trigonometric Parallax+0.03090s
Trigonometric Parallax Uncertainty0.00099s
GCI Unit Vector in X (J2000)-0.618474
GCI Unit Vector in Y (J2000)-0.765103
GCI Unit Vector in Z (J2000)-0.179185
Galactic Longitude352.85°
Galactic Latitude
37.34°
Observational Data
Observed Visual Magnitude (V)4.92
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude5.37
Observed B-V Colour+0.453
Observed B Magnitude or (B-V) Magnitude Uncertainty0.003
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude4.8
Observed Photographic Magnitude5.4
Morgan Keenan (MK) Spectral TypeF5IV
One-Dimensional Spectral ClassF0
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