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1862 Apollo is a stony asteroid, approximately 1.5 kilometers in diameter, classified as a near-Earth object (NEO). It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 24 April 1932, but lost and not recovered until 1973. It is the namesake and the first recognized member of the Apollo asteroids, a subgroup of NEOs which are Earth-crosser, that is they cross the orbit of Earth when view perpendicular to the ecliptic plane (crossing an orbit is a more general term that actually intersecting it). In addition, since ''Apollo''s orbit is highly eccentric, it crosses the orbits of Venus and Mars and is therefore called a Venus-crosser and Mars-crosser as well. Although ''Apollo'' was the first Apollo asteroid to be discovered, its official IAU-number (1862) is higher than that of some other Apollo asteroids such as 1566 Icarus, due to the fact that is was a lost asteroid for more than 40 years and other bodies were numbered in the meantime. The analysis of its rotation provided observational evidence of the YORP effect. It is named after the Greek god Apollo. He's the god of the Sun, child of Zeus and Leto, after which the minor planets 5731 Zeus and 68 Leto are named.〔 == Moon == On November 4, 2005, it was announced that an asteroid moon, or satellite of Apollo, had been detected by radar observations from Arecibo Observatory, Puerto Rico, October 29 – November 2, 2005. The standard provisional designation for this satellite is S/2005 (1862) 1. The announcement is contained in the International Astronomical Union Circular (IAUC) 8627 (). The satellite is just 80 m across and orbits Apollo closely, in an orbit a mere 3 km in radius (). 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「1862 Apollo」の詳細全文を読む スポンサード リンク
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