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1627 Ivar
1627 Ivar, provisional designation 1929 SH, is a large, stony and eccentric asteroid classified as near-Earth object and Amor asteroid, that measures about 9 kilometers in diameter. It was discovered on 25 September 1929 by Danish astronomer Ejnar Hertzsprung at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa.〔 The S-type asteroid orbits the Sun at a distance of 1.1–2.6 AU once every 2.54 years (929 days). Its orbit shows a high eccentricity of 0.40 and is tilted by 8 degrees to the plane of the ecliptic. It has a rotation period of 4.80 hours and an albedo around 0.15.〔〔 In 1985, the body was observed with radar from the Arecibo Observatory in Puerto Rico at a distance of 0.20 AU. The measured radar cross-section was 7.5 square kilometers.〔 Although, as an Amor asteroid, it is a Mars-crosser, that does not cross the orbit of Earth, it has a low Earth minimum orbit intersection distance (MOID) of 0.1122 AU. In 2074, it will pass Earth at 0.141 AU, closer than it actually approached Mars in 1975 (0.150 AU). The minor planet was named by the discoverer in honor of his late brother Ivar Hertzsprung.〔 == References ==
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