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119 Tauri
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119 Tauri : ウィキペディア英語版
119 Tauri


119 Tauri (CE Tau) is a star in the constellation Taurus. It is one of the largest stars known, having a diameter about 600 times that of the Sun. CE Tau is close enough that its distance can be determined accurately by parallax and so the actual diameter can be determined directly from the angular diameter.
119 Tauri is a M-type red supergiant with a mean apparent magnitude of +4.32. It is approximately 1,800 light years from Earth. The star is classified as a semiregular variable star and its brightness varies from magnitude +4.23 to +4.54 with a period of 165 days. With a colour index of +2.07, it is one of the reddest naked eye stars in the night sky.〔 CE Tauri lies 4.6 degrees off the ecliptic. This makes it a candidate for occultations by the Moon and (extremely rarely) by one of the bright planets.
The star's angular diameter and a linear radius of 450 Solar radii have been measured in three colors by lunar occultation. The diameter has also been measured directly by VLTI, leading to a measurement of the radius with a margin of error of .〔
==Notes==




抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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