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1863 Antinous
1863 Antinous, provisional designation 1948 EA, is a stony asteroid classified as near-Earth object, that measures about 2 kilometers in diameter. It was discovered on March 7, 1948 by American astronomer Carl Wirtanen at Lick Observatory on the summit of Mount Hamilton, California.〔
''Antinous'' is also classified as a Mars-crosser and Apollo asteroid. The SU/Sq-type asteroid orbits the Sun at a distance of 0.9–3.6 AU once every 3 years and 5 months (1,240 days). Its orbit has a high eccentricity of 0.61 and is tilted by 18 degrees to the ecliptic plane. It takes 7.46 hours to rotate around its axis. Its albedo is 0.240,〔 while other observations find a much lower value of 0.10–0.11.〔〔〔
It has an Earth ''Minimum orbit intersection distance'' (MOID) of 0.1829 AU. In the 20th century Antinous passed within 30 Gm of the Earth five times; it will do so only once in the 21st. The nearest distance increases each time, from 26 to 29 Gm.
The Apollo asteroid was named after Antinous of Greek mythology. Antinous was one of the many unwelcome suitors for Penelope's hand while her husband, Odysseus, was away on his travels ''(also see 201 Penelope and 1143 Odysseus)''. Antinous, being the most insolent of all, was the first to be killed by Odysseus on his return.〔
== 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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