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・ 129th Infantry Brigade (United Kingdom)
・ 129th Infantry Division (Wehrmacht)
・ 129th Infantry Regiment (United States)
・ 129th meridian
・ 129th meridian east
・ 129th meridian west
・ 129th New York State Legislature
・ 129th Ohio General Assembly
・ 129th Ohio Infantry
・ 129th Regiment of Foot
・ 129th Rescue Squadron
・ 127th Wing
・ 128
・ 128 (number)
・ 128 BC
128 Nemesis
・ 128 Records
・ 128 Securities
・ 128-bit
・ 1280
・ 1280 AM
・ 1280 Baillauda
・ 1280 in Ireland
・ 1280 in Norway
・ 1280 in poetry
・ 1280 West
・ 128036 Rafaelnadal
・ 128065 Bartbenjamin
・ 1280s
・ 1280s BC


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128 Nemesis : ウィキペディア英語版
128 Nemesis

128 Nemesis is a large 188 km main-belt asteroid, of carbonaceous composition. It rotates rather slowly, taking about one and half Earth days (39 hours)〔 to complete one revolution.〔 Nemesis is the largest member of the Nemesian asteroid family bearing its name. It was discovered by J. C. Watson on November 25, 1872,〔 and named after Nemesis, the goddess of retribution in Greek mythology. Nemesis is also the name of a hypothetical companion star of the Sun.
It is categorized as a C-type asteroid,〔 indicating a primitive carbonaceous composition. Based on IRAS data Nemesis is about 188 km in diameter and is around the 33rd largest main-belt asteroid.〔 The 39 hour rotation period is the second longest for an asteroid more than 150 km in diameter.〔
== References ==


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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