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1677 Tycho Brahe
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1677 Tycho Brahe : ウィキペディア英語版
1677 Tycho Brahe

1677 Tycho Brahe, provisional designation 1940 RO, is a stony asteroid from the inner regions of the asteroid belt, about 10 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory on 6 September 1940.〔
The S-type asteroid is a member of the Eunomia family, a large group of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.3–2.8 AU once every 4 years (1,472 days). Its orbit shows an eccentricity of 0.11 and is tilted by 15 degrees to the plane of the ecliptic. It has a rotation period of 3.89 hours〔 and an albedo of 0.23 and 0.47, according to different publications based on the WISE/NEOWISE mission.〔〔
It is named for the great Danish-born astronomer Tycho Brahe (1546–1601) an early forerunner and father of modern astronomy. He is known for his unprecedented precise measurements in the pre-telescopic era. Brahe is also honored by the prominent crater ''Tycho'' in the southern highlands of the Moon and by the Martian cater ''Tycho Brahe''.〔 The bright supernova, SN 1572, is also known as ''Tycho's Nova''.
== References ==


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