英和和英

出典:『Wikipedia』 (2011/06/13 04:49 UTC 版)

英語による解説

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HD 122430 is an orange giant star about 440 light years away in the constellation of Hydra on the celestial sphere. The star has completely run out of the hydrogen fuel that keeps it stable, although its age is only 3.1 billion years old, younger than the Sun’s 4.6 billion years. HD 122430 has a mass of 1.4 times and radius of 22.9 times that of the Sun. Despite its younger age, it has slightly lower metallicity, approximately 90%. The temperature of its surface (photosphere) is approximately 4300 kelvins.