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Anwar al Farkadain : ウィキペディア英語版 | Eta Ursae Minoris
Eta Ursae Minoris (η UMi, η Ursae Minoris) is a star in the constellation Ursa Minor. It has the traditional names Anwar al Farkadain and Alasco. The first is from the Arabic أنور الفرقدين ''’anwar al-farqadayn'' "the brighter of the two calves", as opposed to Ahfa al Farkadain (ζ UMi) "the dimmer of the two calves"; these names were originally applied to Kochab, and Pherkad, respectively, the other two stars in the rectangle of Ursa Minor. Eta Ursae Minoris is a yellow-white F-type main sequence dwarf of spectral type F5V with an apparent magnitude of +4.95,〔SIMBAD, (Eta Ursae Minoris ) (accessed 30 July 2014)〕 making it visible to the naked eye. It is approximately 97 light years from Earth.〔 This star has 1.41 times the mass of the Sun, with a projected rotational velocity of 76.0 km s−1.〔 ==References==
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