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Alpha¹ Capricorni : ウィキペディア英語版 | Alpha1 Capricorni
:''For other star systems with this Bayer designation, see Alpha Capricorni.'' Alpha1 Capricorni (α1 Cap, α1 Capricorni) is a double star in the southern constellation of Capricornus. It also has the traditional star name Prima Giedi or Algiedi Prima, and shares the name Algedi (from الجدي - ''al-jadii'', meaning ''the goat'') with α² Capricorni. It is approximately 690 light years from Earth. This is a yellow G-type supergiant with an apparent magnitude of +4.30. This star has 5.3 times the mass of the Sun and is radiating around 1,047 times the Sun's luminosity.〔 It has an 8th magnitude companion, separated by 0.65 arcseconds from the primary. ==In popular culture== The name ''Giedi Prime'' is used for a fictional planet in Frank Herbert's 1965 science fiction novel ''Dune''. The planet Giedi Prime is known to be the home planet of the Harkonnens.
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