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2005 TN74
(also written 2005 TN74) is a trans-Neptunian object (TNO)〔Most SDOs have a perihelion distance greater than 35AU and an eccentricity of more than 0.3.〕 in a 3:5 resonance with Neptune.〔(Orbit Fit and Astrometric record for 05TN74 )〕 It was discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2005. It was initially suspected of being a Neptune trojan since the first observations gave it a semi-major axis of 30 AU and an orbital eccentricity of 0.16, but further observations showed it to have a semi-major axis of 42.7 AU, a perihelion of 32.1 AU, and an aphelion of 53.4 AU.〔 With an absolute magnitude of 7.2,〔 it has an expected diameter in the range of 85 to 240 km.〔(【引用サイトリンク】url=http://neo.jpl.nasa.gov/glossary/h.html )〕 It has been observed 19 times over four oppositions.〔 ==References==
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