Astronomy
Constellations - Ara - alp Ara

 
Identification Data
Common Name
ConstellationAra
Star Namealp Ara
Skymap Number17310163
Henry Draper (HD) Number158427
Harvard Revised (HR) Number6510
SAO Number228069
Durchmusterung (DM) NumberCD-4911511
Washington Double Stars (WDS) Number
17318-4953
Positional Data
Position and Proper Motion (PPM) Number323069
Right Ascension (RA) J200017h 31m 50.493s
Declination (Dec) J2000-49° 52' 34.121"
Position Uncertainty0.0087s
Proper Motion in RA (J2000)/cos(Dec)-0.00324
Proper Motion in Dec (J2000)-0.067266
Radial Velocity+000.0km s-1
Trigonometric Parallax+0.01346s
Trigonometric Parallax Uncertainty0.00095s
GCI Unit Vector in X (J2000)-0.078980
GCI Unit Vector in Y (J2000)-0.639584
GCI Unit Vector in Z (J2000)-0.764653
Galactic Longitude340.76°
Galactic Latitude
-8.83°
Observational Data
Observed Visual Magnitude (V)2.85
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude2.74
Observed B-V Colour-0.113
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 Magnitude3.0
Observed Photographic Magnitude2.8
Morgan Keenan (MK) Spectral TypeB2Vne
One-Dimensional Spectral ClassB3
Position Angle173
Year of Observation1913. 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 13:15:33 GMT+01:00 2001