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|dimensions= in diameter. |discoverer=Asaph Hall |naming=Chloe Angeline Stickney Hall }} Stickney is the largest crater on Phobos, which is a satellite of Mars. It is in diameter, taking up a substantial proportion of the moon's surface. The crater is named after Chloe Angeline Stickney Hall, wife of Phobos's discoverer, Asaph Hall. In 1878 Hall wrote that he "might have abandoned the search (Martian satellites ) had it not been for the encouragement of () wife."〔Hall, Asaph, ''Observations and orbits of the satellites of Mars'', Washington: Government Printing Office, 1878 (quoted in Hall, Angelo, ''An astronomer's wife'', Baltimore: Nunn and Company, 1908, p. 112).〕 The crater was named in 1973, based on Mariner 9 images, by an IAU nomenclature committee chaired by Carl Sagan.〔Veverka, Joseph et al. "A Mariner 9 atlas of the moons of Mars," ''Icarus'' 23, 206-289 (1974).〕 Stickney has a smaller crater within it, about in diameter, resulting from a later impact. In 2006 it was given the name Limtoc, after a character in Gulliver's Travels.〔 Grooves and crater chains appear to radiate from Stickney. These have led to theories about the impact that formed Stickney nearly destroying the moon. However, evidence from the ''Mars Express'' orbiter indicate that they are unrelated to Stickney and may have been formed by material ejected from impacts on Mars.〔Murray, John B. et al. "(New evidence on the origin of Phobos' parallel grooves from HRSC Mars Express )," Lunar and Planetary Science XXXVII (2006).〕 More recent modelling supports the theory that the grooves are signs of deformation caused by tidal forces. The crater has a noticeable lineated texture on its interior walls, caused by landslides from materials falling into the crater. It is possible that Stickney is large enough to be seen with the naked eye from the surface of Mars.〔Calculating the angular size of an object with a diameter of at a distance of , yields 9/9250 * 206265 = 200 arcseconds. An object needs a size of 60 arcseconds to be resolved by the naked eye.〕 It is located at the middle of the western edge of the the Mars-facing side of Phobos. ==See also== * Deimos (moon) * List of features on Phobos and Deimos * Moons of Mars 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「Stickney (crater)」の詳細全文を読む スポンサード リンク
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