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==Discoveries==
He has discovered numerous asteroids, particularly [[near-Earth asteroid]]s, including {{mpl|(35396) 1997 XF|11}}, which briefly created a stir in the news media when a preliminary orbit calculation indicated the possibility of [[Earth]] impact in 2028; further observations led to a more accurate orbit, which disproved the impact. In 1991, he discovered [[1991 VG]], a [[Near-Earth object]] with some unusual characteristics. In 2013, he discovered {{mpl|2013 BS|45}}, another NEO that moves in a low [[eccentricity]] and low [[inclination]] orbit.
He has also recovered more than 75 [[comet]]s starting in 1985 (since comets are subject to non-gravitational forces due to outgassing and solar wind, it is often a challenge to predict their exact position and rediscover them each time they make a new [[perihelion]] approach). He confirmed the discovery of the well known [[Comet Shoemaker-Levy 9]], which impacted [[Jupiter]] in July 1994. He has also discovered the [[List of periodic comets|periodic comets]] [[202P/Scotti]], [[244P/Scotti]], [[P/2003 L1]] (Scotti), [[P/2010 C1]] (Scotti), [[P/2010 H4]] (Scotti), [[P/2010 H5]] (Scotti), [[P/2011 A2]] (Scotti), the later seven are not yet numbered as they have only been seen at one perihelion passage. He has also discovered [[List of non-periodic comets|non-periodic comets]] [[C/2010 E5]] (Scotti) and [[C/2010 F3]] (Scotti).
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