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・ 41 (song)
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・ 41 cm/45 3rd Year Type naval gun
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41 Daphne
・ 41 equal temperament
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・ 41 Original Hits from the Soundtrack of American Graffiti
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・ 41 Signal Regiment
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41 Daphne : ウィキペディア英語版
41 Daphne

41 Daphne is a large 174 km main-belt asteroid.〔 This dark-surfaced body is probably composed of primitive carbonaceous chondrites. It was discovered by H. Goldschmidt on May 22, 1856, and named after Daphne, the nymph in Greek mythology who was turned into a laurel tree. Incorrect orbital calculations initially resulted in 56 Melete being mistaken for a second sighting of Daphne. Daphne was not sighted again until August 31, 1862.
The orbit of 41 Daphne places it in a 9:22 mean motion resonance with the planet Mars. The computed Lyapunov time for this asteroid is 14,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets.〔
In 1999, Daphne occulted three stars, and on July 2, 1999 produced eleven chords indicating an ellipsoid of 213×160 km.〔 Daphnean lightcurves also suggest that the asteroid is irregular in shape. Daphne was observed by Arecibo radar in April 2008.〔〔 Based upon radar data, the near surface solid density of the asteroid is 2.4.〔
== Satellite ==

41 Daphne has at least one satellite, designated S/2008 (41) 1.〔 It was identified on March 28, 2008, and has a projected separation of 443 km, an orbital period of approximately 1.1 days,〔 and an estimated diameter of less than 2 km. If these preliminary observations hold up, this binary system has the most extreme size ratio known.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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