Tags: Planet.
2012 KT42 is an asteroid discovered by Alex R. Gibbs of the Mt. Lemmon Survey (part of the Catalina Sky Survey) with a 1.5-m reflector + CCD on May 28 2012. The asteroid had a close approach to the Earth on May 29 2012 approaching to only ~8950 miles / ~14440 km above the planet’s surface. This means 2012 KT42 came inside the Clarke Belt of geosynchronous satellites. As of May 28 2012 the estimated 5 to 10 meter wide asteroid ranked #6 on the top 20 list of closest-approaches to Earth.