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1656 Suomi, provisional designation 1942 EC, is a stony asteroid in the asteroid belt classified as a Mars-crosser, about 8 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory on March 11, 1942.〔 The S-type asteroid orbits the Sun at a distance of 1.6–2.1 AU once every 2.57 years (940 days). Its orbit shows an eccentricity of 0.12 and is tilted by 25 degrees to the plane of the ecliptic. It has a rotation period of 2.583 hours and an albedo of 0.156. Measurements by IRAS show that the asteroid is 8 kilometers in diameter, making it the 9th largest Mars crossing asteroid with a known diameter.〔 This asteroid is a Hungaria family object with a rotational period of 2.583 hours based on 2009 observations.〔 Earlier observations published in 2004 and 2008 had estimated rotational period of 2.59 hours, while observations published in 1997 had originally estimated a rotational period of 2.42 hours.〔〔 As with 1453 Fennia, it is named after Finland, Suomi being the Finnish word for Finland.〔〔 == References == }} 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1656 Suomi」の詳細全文を読む スポンサード リンク
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