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Astronomy
Constellations - Ursa Minor - 1alp UMi (Polaris)

 
Identification Data
Common NamePolaris
ConstellationUrsa Minor
Star Name1alp UMi
Skymap Number2480053
Henry Draper (HD) Number8890
Harvard Revised (HR) Number424
SAO Number308
Durchmusterung (DM) NumberBD+88 8
Washington Double Stars (WDS) Number
02309+8915
Positional Data
Position and Proper Motion (PPM) Number431
Right Ascension (RA) J20002h 31m 49.083s
Declination (Dec) J2000+89° 15' 50.794"
Position Uncertainty0.0064s
Proper Motion in RA (J2000)/cos(Dec)+0.22953
Proper Motion in Dec (J2000)-0.011866
Radial Velocity-017.4km s-1
Trigonometric Parallax+0.00756s
Trigonometric Parallax Uncertainty0.00048s
GCI Unit Vector in X (J2000)0.010127
GCI Unit Vector in Y (J2000)0.007899
GCI Unit Vector in Z (J2000)0.999918
Galactic Longitude123.28°
Galactic Latitude
26.46°
Observational Data
Observed Visual Magnitude (V)2.00
Derived Visual Magnitude
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty0.003
Observed B Magnitude2.62
Observed B-V Colour+0.620
Observed B Magnitude or (B-V) Magnitude Uncertainty0.003
Observed U Magnitude
Observed U-B Colour
Observed U Magnitude or (U-B) Magnitude Uncertainty
Observed Photovisual Magnitude2.1
Observed Photographic Magnitude
Morgan Keenan (MK) Spectral TypeF7:Ib-II
One-Dimensional Spectral ClassF8
Position Angle216
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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