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1657 Roemera : ウィキペディア英語版 | 1657 Roemera
1657 Roemera, provisional designation 1961 EA, is a stony asteroid from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland on 6 March 1961.〔 The asteroid orbits the Sun at a distance of 1.8–2.9 AU once every 3.6 years (1,314 days). Its orbit shows an eccentricity of 0.24 and is tilted by 23 degrees to the plane of the ecliptic. The S-type asteroid has a long rotation period of 34 hours〔 and a relatively high albedo of 0.22.〔 It was named by the discoverer in honor American female astronomer Elizabeth Roemer (b. 1929), U.S. Naval Observatory, in appreciation of her untiring and successful efforts to advance the knowledge of the motions and physical properties of comets and minor planets.〔 Roemer herself discovered the asteroids 1930 Lucifer and 1983 Bok. == References ==
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