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HD 142
HD 142 is a 6th magnitude yellow-white dwarf star approximately 84 light years away〔 in the constellation of Phoenix. A companion star was detected in 1894 making this a binary star system.〔 The binary companion was confirmed in 2007 and determined to be of spectral type K8.5-M1.5 with a mass 59% that of the sun.〔
==Planetary system==
In 2001, the Anglo-Australian Planet Search team led by Chris Tinney announced the discovery of an extrasolar planet orbiting the star.〔〔 An additional linear trend in the radial velocity data was noticed in 2006〔 that could have been due to another planet or to the stellar companion.〔 In 2012, additional measurements allowed the detection of a second planet. A third possible planet with a period of 108 days was seen in the data however the false alarm probability was five percent.〔
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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