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Astronomy
Constellations - Scorpius - 23tau Sco (Alniyat)

 
Identification Data
Common NameAlniyat
ConstellationScorpius
Star Name23tau Sco
Skymap Number16350164
Henry Draper (HD) Number149438
Harvard Revised (HR) Number6165
SAO Number184481
Durchmusterung (DM) NumberCD-2711015
Washington Double Stars (WDS) Number

Positional Data
Position and Proper Motion (PPM) Number265701
Right Ascension (RA) J200016h 35m 52.953s
Declination (Dec) J2000-28° 12' 57.658"
Position Uncertainty0.0091s
Proper Motion in RA (J2000)/cos(Dec)-0.00065
Proper Motion in Dec (J2000)-0.022566
Radial Velocity+002.0km s-1
Trigonometric Parallax+0.00759s
Trigonometric Parallax Uncertainty0.00078s
GCI Unit Vector in X (J2000)-0.316205
GCI Unit Vector in Y (J2000)-0.822482
GCI Unit Vector in Z (J2000)-0.472797
Galactic Longitude351.54°
Galactic Latitude
12.81°
Observational Data
Observed Visual Magnitude (V)2.83
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude2.62
Observed B-V Colour-0.207
Observed B Magnitude or (B-V) Magnitude Uncertainty0.002
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude2.9
Observed Photographic Magnitude2.7
Morgan Keenan (MK) Spectral TypeB0V
One-Dimensional Spectral ClassB0
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 13:15:49 GMT+01:00 2001
 
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