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Encyclopedia > Epsilon Canis Majoris

Epsilon Canis Majoris (ε CMa / ε Canis Majoris), is the second brightest star in the constellation Canis Major, and one of the brightest stars in the nighttime sky. It has the Bayer designation "epsilon" despite being the second brightest and not the fifth brightest star in its constellation. It also has the traditional name Adhara (sometimes spelled Adara). The name is from the Arabic word عذارى ‘aðāra’, "virgins".-1... Canis Major (Latin for big dog) is one of the 88 modern constellations, and was also in Ptolemys list of 48 constellations. ... Bright stars can be bright because they produce more light, because they are closer to us, or both. ... Many of the brighter stars are given names which are known as Bayer designations. ...

Adhara is a binary star, 470 light years distant from Earth. The main star possesses an apparent magnitude of +1.5 and belongs to the spectral classification B2. The +7.5 magnitude companion star (the absolute magnitude amounts to −5.0) is at 7.5" away with a position angle of 161° of the main star. Despite the relatively large angular distance the components can only be resolved in large telescopes, since the main star is approximately 250 times brighter than its companion. A binary star system consists of two stars both orbiting around their barycenter. ... 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. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ...

Coordinates (equinox 2000)

  Results from FactBites:
Canis Major - Encyclopedia.com (1091 words)
Known as the Large Dog (Canis Minor is the Small Dog), it was associated with the figure of a dog by many cultures; the ancient Greeks identified it as one of Orion's hunting dogs, while the Scandinavians called it Sigurd's dog.
Castor canadensis), coyote (Canis lupus), and bobcat (Lynx rufus...
Tricophyton mentagrophytes and Microsporum canis, dermatophytes responsible for infection...
Constellations: Canis Major, The Greater Dog (246 words)
Canis Major lies close to Lepus and Monoceros, and represents the larger of two dogs following Orion.
Canis Major contains one Messier object, M41 (NGC2287), a large and bright, naked eye open cluster containing around 100 stars with an integrated magnitude of 4.5, and NGC 2362, a compact cluster of around 60 stars surrounding Tau Canis Majoris.
Isis was responsible helping Osiris to return to life; and for assisting her husband to rule in the Land of the Dead.
  More results at FactBites »



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