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10370 Hylonome : ウィキペディア英語版 | 10370 Hylonome
10370 Hylonome (; from (ギリシア語:''‘Υλονομη'')) is a small Solar System body orbiting in the outer Solar System. It belongs to the class of icy objects that are known as centaurs, with an orbit that crosses the orbit of Neptune and grazes that of Uranus. It was discovered on February 27, 1995.〔 10370 Hylonome was named for Hylonome, a female centaur in Greek mythology. Observations with the infrared Spitzer Space Telescope show a diameter of plus or minus 20 km (50 to 90 km in diameter), or a 35 km radius.〔 == Orbit ==
The orbits of centaurs are unstable due to perturbations by the giant planets. Currently Uranus controls Hylonome's perihelion and Neptune its aphelion.〔 It is estimated to have a relatively long orbital half-life of about 6.37 Myr.〔 In the year 3478, Hylonome will pass within ~85 Gm of Uranus and its semi-major axis will be reduced to 23.5 AU.〔
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