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MOA-2007-BLG-192L
MOA-2007-BLG-192L is a low-mass red dwarf star or brown dwarf, approximately 3,000 light-years away in the constellation of Sagittarius. It is estimated to have a mass approximately 6% of the Sun's.〔 In 2008, an Earth-sized extrasolar planet was announced to be orbiting this object.〔
== Planetary system ==
The discovery of a planet, MOA-2007-BLG-192Lb, orbiting this object was announced on June 2, 2008.〔( MOA-2007-BLG-192Lb: A Low-Mass Planet with a Possible Sub-Stellar-Mass Host ), David P. Bennett. Accessed on line July 3, 2008.〕 This planet, with a mass of approximately 3.3 times that of Earth, is one of the smallest known extrasolar planets. It was found when it caused a gravitational microlensing event on the night of May 24, 2007, which was detected as part of the MOA-II gravitational microlensing survey at the Mount John University Observatory in New Zealand.〔
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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