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HD 108147
HD 108147 is a 7th magnitude star in the constellation of Crux in direct line with and very near to the bright star Acrux or Alpha Crucis. It is either a yellow-white or yellow dwarf (the line is arbitrary and the colour difference is only from classification, not real), slightly brighter and more massive than our Sun. The spectral type is F8 V or G0 V. The star is also younger than the Sun. Due to its distance, about 130 light years, it is too dim to be visible with unaided eye; with binoculars it is an easy target. However, due to its southerly location it is not visible in the northern hemisphere except for the tropics.
An extrasolar planet was detected orbiting it in 2000 by the Geneva Extrasolar Planet Search Team.〔 This exoplanet is "a gas giant smaller than Jupiter that screams around its primary () in 11 days at only 0.1 AU." This is much closer than the orbit of Mercury in our solar system.〔Musgrave, Ian, ''“Starhopping - The Crux of the Matter”'' in ''‘Sky & Space’'' magazine, September–October 2006, Galaxy publishing.〕
It should not be confused with HD 107148, which also has an extrasolar planet discovered in 2006 in the Virgo constellation.
== See also ==
* List of extrasolar planets
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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