Matches in DBpedia 2014 for { ?s ?p (242450) 2004 QY2 is a large near-Earth asteroid and potentially hazardous object. It has a well determined orbit with an observation arc of 7 years and an uncertainty parameter of 0. It was discovered on 20 August 2004 by the Siding Spring Survey at an apparent magnitude of 16.5 using the 0.5-metre (20 in) Uppsala Southern Schmidt Telescope.Based on an absolute magnitude of 15, the asteroid has an estimated diameter of 3.5 to 7.7 km. 2004 QY2 is one of the largest potentially hazardous asteroids (PHA) discovered. As of 2013 it has the brightest absolute magnitude of any PHA since its discovery. On 29 July 2012 it passed Earth at a distance of 0.4314 AU (64,540,000 km; 40,100,000 mi).Given the estimated size of roughly 5km, 2004 QY2 is one of the largest objects to appear on the Sentry Risk Table. It was removed from the Sentry Risk Table on 25 August 2004.. }
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- (242450)_2004_QY2 abstract "(242450) 2004 QY2 is a large near-Earth asteroid and potentially hazardous object. It has a well determined orbit with an observation arc of 7 years and an uncertainty parameter of 0. It was discovered on 20 August 2004 by the Siding Spring Survey at an apparent magnitude of 16.5 using the 0.5-metre (20 in) Uppsala Southern Schmidt Telescope.Based on an absolute magnitude of 15, the asteroid has an estimated diameter of 3.5 to 7.7 km. 2004 QY2 is one of the largest potentially hazardous asteroids (PHA) discovered. As of 2013 it has the brightest absolute magnitude of any PHA since its discovery. On 29 July 2012 it passed Earth at a distance of 0.4314 AU (64,540,000 km; 40,100,000 mi).Given the estimated size of roughly 5km, 2004 QY2 is one of the largest objects to appear on the Sentry Risk Table. It was removed from the Sentry Risk Table on 25 August 2004.".