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2010 RX30 2010 RX30 is a near-Earth asteroid that passed between the Earth and the Moon on September 8, 2010 at 09:51 UTC, approaching Earth within above Japan. NASA estimated its size to be 12 metres in diameter with a mass of around 2500 tonnes.〔(2010 RX30 Impact Risk )〕 The asteroid was discovered by the Catalina Sky Survey near Tucson, Arizona on September 5, 2010 along with 2010 RF12. ==See also==
* 2010 RF12, another asteroid that passed Earth the same day * List of notable asteroids#Record-setting close approaches to Earth
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