It is 101 light years from Earth, and has an apparent magnitude of +1.73, and belongs to the spectral classification B7. A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequenly refined in terms of other characteristics. ...
Categories: Star stubs | Bayer objects | Blue-white subgiants | Grus constellation Jump to: navigation, search The J2000. ... Right ascension (RA; symbol Î±: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ...
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