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Rho3 Arietis : ウィキペディア英語版 | Rho3 Arietis
:''For other star systems with this Bayer designation, see Rho Arietis.''
Rho3 Arietis (Rho3 Ari, ρ3 Arietis, ρ3 Ari) is the Bayer designation for a star in the northern constellation of Aries. It is faintly visible to the naked eye with an apparent visual magnitude of 5.63.〔 Based upon an annual parallax shift of 28.29 mas,〔 this star is located at a distance of approximately from Earth. This is an astrometric binary system.〔 The visible component is an F-type main sequence star with a stellar classification of F6 V.〔 It is around 2.4 billion years old〔 and has a high abundance of elements other than hydrogen and helium when compared to the Sun.〔 ==Name==
This star, along with δ Ari, ε Ari, ζ Ari, and π Ari, were Al Bīrūnī's Al Buṭain (ألبطين), the dual of ''Al Baṭn'', the Belly.〔 According to the catalogue of stars in the ''Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars'', ''Al Buṭain'' were the title for five stars : δ Ari as ''Botein'', π Ari as ''Al Buṭain I'', ρ3 Ari as ''Al Buṭain II'', ε Ari as ''Al Buṭain III'' dan ζ Ari as ''Al Buṭain IV''〔(Jack W. Rhoads - ''Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars'', Jet Propulsion Laboratory, California Institute of Technology; November 15, 1971 )〕
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