Alpha Cassiopeiae Article Index for
Alpha
Limousines in
Alpha
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Alpha
 

Information About

Alpha Cassiopeiae




name=Alpha Cassiopeiae }}
  Epoch J2000
  Ra 00<sup>h</sup> 40<sup>m</sup> 305<sup>s</sup>
  Dec +56&deg 32&prime 145&Prime
  Appmag V 224


  Class K0 IIIa
  B-v 117
  U-b 113


  Radial V -38
  Prop Mo Ra 5036
  Prop Mo Dec -3217
  Parallax 1427
  P Error 057
  Dist Ly 229
  Dist Pc 701


  Mass 4&ndash5
  Radius 42
  Luminosity 855
  Temperature 4,530
  Metal
  Rotation 21 km/sec





Alpha Cassiopeiae (α Cas / α Cassiopeiae ) is the second-brightest Star in the Constellation Cassiopeia ( Magnitude 2.25). It also has the traditional name '''Schedar'''.

It is an orange Giant ( Spectral Type K0 IIIa), a type of star cooler but much brighter than our Sun . In visible light only, it is well over 500 times brighter than the Sun. According to the '' Hipparcos '' Astrometrical Satellite , distance to the star is about 230 Light Year s (or 70 Parsec s).

Schedar has been sometimes classified as a Variable Star , but no variability have been detected since 19th Century . Also, three companions to the star have been listed in the Washington Visual Double Star Catalog , but it seems that all of them are just line-of-sight Optical Components .

The name Schedar (or ''Shedar'', ''Shedir'') comes from the Arabic word '''صدر''' ''şadr'', "breast".


EXTERNAL LINK

  • Shedar at Jim Kaler's Stars site