2010 RX30

 is a micro-asteroid, classified as near-Earth object of the Aten group. On 8 September 2010 at 09:51 UTC, it passed between the Earth and the Moon approaching Earth within 248 000  kilometres above Japan.

NASA estimated its size to be 12 metres in diameter with a mass of around 2500 tonnes.

The asteroid was discovered by the Catalina Sky Survey near Tucson, Arizona on 5 September 2010, along with.