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Astronomy
Constellations - Ursa Major - 54nu UMa (Alula Borealis)

 
Identification Data
Common NameAlula Borealis
ConstellationUrsa Major
Star Name54nu UMa
Skymap Number11180058
Henry Draper (HD) Number98262
Harvard Revised (HR) Number4377
SAO Number62486
Durchmusterung (DM) NumberBD+33 2098
Washington Double Stars (WDS) Number
11185+3306
Positional Data
Position and Proper Motion (PPM) Number75790
Right Ascension (RA) J200011h 18m 28.736s
Declination (Dec) J2000+33° 5' 39.500"
Position Uncertainty0.0091s
Proper Motion in RA (J2000)/cos(Dec)-0.00212
Proper Motion in Dec (J2000)+0.027566
Radial Velocity-009.2km s-1
Trigonometric Parallax+0.00774s
Trigonometric Parallax Uncertainty0.00079s
GCI Unit Vector in X (J2000)-0.824062
GCI Unit Vector in Y (J2000)0.150950
GCI Unit Vector in Z (J2000)0.546019
Galactic Longitude190.74°
Galactic Latitude
69.08°
Observational Data
Observed Visual Magnitude (V)3.49
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.002
Observed B Magnitude4.90
Observed B-V Colour+1.406
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 Magnitude3.7
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeK3-III
One-Dimensional Spectral ClassK0
Position Angle147
Year of Observation1973. 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 13:15:52 GMT+01:00 2001
 
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