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Zeta Leporis : ウィキペディア英語版 | Zeta Leporis
Zeta Leporis (ζ Lep, ζ Leporis) is a star approximately away in the southern constellation of Lepus. It has an apparent visual magnitude of 3.5,〔 which is bright enough to be seen with the naked eye. In 2001, an asteroid belt was confirmed to orbit the star. ==Stellar components== Zeta Leporis has a stellar classification of A2 IV-V(n),〔 suggesting that it is in a transitional stage between an A-type main-sequence star and a subgiant. The (n) suffix indicates that the absorption lines in the star's spectrum appear nebulous because it is spinning rapidly, causing the lines to broaden because of the Doppler effect. The projected rotational velocity is 245,〔 giving a lower limit on the star's actual equatorial azimuthal velocity. The star has about 1.46 times the mass of the Sun,〔 along with 1.5 times the radius,〔 and 14 times the luminosity.〔 The abundance of elements other than hydrogen and helium, what astronomers term the star's metallicity, is only 17% of the abundance in the Sun.〔 The star appears to be a very young, probably around 231 million years in age, but the margin of error spans 50–347 million years old.〔
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