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WASP-43b is a transiting planet in orbit around the young, active, and low-mass star WASP-43 in the constellation Sextans. The planet is a Hot Jupiter with a mass twice that of Jupiter, and a radius equal to Jupiter's. WASP-43b was flagged as a candidate by the SuperWASP program before they conducted follow-ups using instruments at La Silla Observatory in Chile, which confirmed the planet's existence and provided orbital and physical characteristics. The planet's discovery was published on April 14, 2011.〔 At the time of its discovery, WASP-43b had an orbital period of approximately 0.8 days (19.2 hours), the second shortest orbit ever detected, surpassed only by WASP-19b.〔 In addition, at the time of discovery, WASP-43b was the most closely orbiting Hot Jupiter known,〔 a phenomenon that can most likely be explained by its host star's low mass. ==Observational history== WASP-43 was first flagged as host to a potential transiting event (when a body crosses in front of and dims its host star) by data collected by SuperWASP, a British organization working to discover transiting planets across the entirety of the sky. In particular, WASP-43 was observed first by the leg of WASP-South at the South African Astronomical Observatory between January and May 2009.〔 Later observation by both SuperWASPs in the Northern and Southern Hemispheres led to the collection of 13,768 data points between January and May 2010 and to the use of the CORALIE spectrograph at La Silla Observatory in Chile. Fourteen measurements using the radial velocity method confirmed WASP-43b as a planet, revealing its mass in the process. The use of La Silla's TRAPPIST telescope helped the science team working on the planet to create a light curve of the planet's transit in December 2010.〔 The planet's discovery was published in the journal ''Astronomy and Astrophysics'' on April 14, 2011.〔 In 2014, secondary transit of the planet was reported. 〔http://arxiv.org/abs/1401.3007〕 Full observation of phases of the planet was reported in the September of 2014. 〔http://www.nasa.gov/press/2014/october/nasas-hubble-maps-the-temperature-and-water-vapor-on-an-extreme-exoplanet/index.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「WASP-43b」の詳細全文を読む スポンサード リンク
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