Astronomy
Constellations - Orion - 50zet Ori (Alnitak)

 
Identification Data
Common NameAlnitak
ConstellationOrion
Star Name50zet Ori
Skymap Number5400159
Henry Draper (HD) Number37742
Harvard Revised (HR) Number1948
SAO Number132444
Durchmusterung (DM) NumberSD-02 1338
Washington Double Stars (WDS) Number
05407-0157
Positional Data
Position and Proper Motion (PPM) Number400076
Right Ascension (RA) J20005h 40m 45.527s
Declination (Dec) J2000-1° 56' 33.260"
Position Uncertainty0.0074s
Proper Motion in RA (J2000)/cos(Dec)+0.00027
Proper Motion in Dec (J2000)+0.002567
Radial Velocity+018.6km s-1
Trigonometric Parallax+0.00399s
Trigonometric Parallax Uncertainty0.00079s
GCI Unit Vector in X (J2000)0.083809
GCI Unit Vector in Y (J2000)0.995905
GCI Unit Vector in Z (J2000)-0.033898
Galactic Longitude206.46°
Galactic Latitude
-16.59°
Observational Data
Observed Visual Magnitude (V)1.74
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.001
Observed B Magnitude
Observed B-V Colour-0.199
Observed B Magnitude or (B-V) Magnitude Uncertainty0.022
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude2.1
Observed Photographic Magnitude1.8
Morgan Keenan (MK) Spectral TypeO9.7Ib
One-Dimensional Spectral ClassB0
Position Angle166
Year of Observation1990. 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