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Omicron Arietis : ウィキペディア英語版 | Omicron Arietis
Omicron Arietis (ο Ari, ο Arietis) is the Bayer designation for a star in the northern constellation of Aries. Based upon an annual parallax shift of ,〔 it is distant from Earth. This star has an apparent visual magnitude of +5.78,〔 which means it is dimly visible to the naked eye. This is a B-type main sequence star with a stellar classification of B9 Vn.〔 The 'n' suffix indicates that it has nebulous absorption lines in its spectrum, which are caused by the Doppler effect and rapid rotation. Indeed, it has a projected rotational velocity of 225 km/s.〔 ==References==
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