Astronomy
Constellations - Orion - 46eps Ori (Alnilam)

 
Identification Data
Common NameAlnilam
ConstellationOrion
Star Name46eps Ori
Skymap Number5360046
Henry Draper (HD) Number37128
Harvard Revised (HR) Number1903
SAO Number132346
Durchmusterung (DM) NumberBD-01 969
Washington Double Stars (WDS) Number
05362-0112
Positional Data
Position and Proper Motion (PPM) Number175945
Right Ascension (RA) J20005h 36m 12.813s
Declination (Dec) J2000-1° 12' 6.911"
Position Uncertainty0.0080s
Proper Motion in RA (J2000)/cos(Dec)+0.00010
Proper Motion in Dec (J2000)-0.001166
Radial Velocity+025.9km s-1
Trigonometric Parallax+0.00243s
Trigonometric Parallax Uncertainty0.00091s
GCI Unit Vector in X (J2000)0.103579
GCI Unit Vector in Y (J2000)0.994400
GCI Unit Vector in Z (J2000)-0.020976
Galactic Longitude205.22°
Galactic Latitude
-17.24°
Observational Data
Observed Visual Magnitude (V)1.72
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.005
Observed B Magnitude1.60
Observed B-V Colour-0.123
Observed B Magnitude or (B-V) Magnitude Uncertainty0.007
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude1.8
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeB0Ia
One-Dimensional Spectral ClassB0
Position Angle57
Year of Observation1907. 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 13:15:46 GMT+01:00 2001