1862 Apollo () is a Q-type asteroid, discovered by Karl Reinmuth in 1932, but lost and not recovered until 1973. It is named after the Greek god Apollo.

It is the namesake of the Apollo asteroids, and the first one discovered, although because it was lost for a time its asteroid number (1862) is higher than that of some other Apollo asteroids such as 1566 Icarus. Analysis of the spin of this object provided observational evidence of the YORP effect.

It was the first asteroid recognized to cross Earth's orbit. It is also a Venus- and Mars-crosser asteroid.

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 http://www.cbat.eps.harvard.edu/iauc/08600/08627.html. The satellite is just 80 m across and orbits Apollo closely, in an orbit a mere 3 km in radius http://www.johnstonsarchive.net/astro/astmoons/am-01862.html.

Further reading

See also

• Lost asteroid

External links

• (1862) Apollo in the Minor Planet Center's Database
• NASA JPL orbital simulation 1862 Apollo (Java)

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