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Jingpo Lacus
Jingpo Lacus is a lake in the north polar region of Titan, the planet Saturn's largest moon. It and similarly sized Ontario Lacus are the largest known bodies of liquid on Titan after the three maria (Kraken Mare, Ligeia Mare and Punga Mare). It is composed of liquid hydrocarbons (mainly methane and ethane). It is west of Kraken Mare at 73° N, 336° W, roughly 240 km (150 mi) long,〔〔 similar to the length of Lake Onega on Earth. Its namesake is Jingpo Lake,〔 a scenic lake in China.
==Specular reflection==
On 8 July 2009, ''Cassinis Visual and Infrared Mapping Spectrometer (VIMS) observed a specular reflection in 5 µm infrared light off Jingpo Lacus at 71° N, 337° W. (This has sometimes been described less accurately as at the southern shoreline of Kraken Mare.) Specular reflections indicate a smooth mirror-like surface, so the observation corroborated the inference of the presence of a large liquid body drawn from radar imaging. The observation was made soon after the north polar region emerged from 15 years of winter darkness.
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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