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1680 Per Brahe : ウィキペディア英語版 | 1680 Per Brahe
1680 Per Brahe, provisional designation 1942 CH, is a bright, stony asteroid from the outer region of the asteroid belt, about 15 kilometers in diameter. It was discovered by Finnish female astronomer Liisi Oterma at Turku Observatory on 12 February 1942.〔 The asteroid orbits the Sun at a distance of 2.2–3.2 AU once every four and a half years (1,644 days). Its orbit shows an eccentricity of 0.18 and is tilted by 4 degrees to the plane of the ecliptic. Light-curve photometry carried out in 2006 and 2012, rendered a rotation period of 3.4 hours.〔〔 The geometric albedo of the S-type asteroid varies between 0.18 and 0.40, based on the different results from the IRAS, Akari, WISE and NEOWISE surveys.〔〔〔〔 The minor planet was named after Swedish count Per Brahe (1602–1680), who was Governor General of Finland in the 17th century. His prosperous legacy saw the establishment of Academia Aboensis, the first university in Finland, the construction of various new towns and many schools, and the publication of the first Finnish Bible.〔 == References ==
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