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aphelion

The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

aphelion , point farthest from the sun in the orbit of a body about the sun. See apsis .

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"aphelion." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 9 Jul. 2009 <http://www.encyclopedia.com>.

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aphelion
Book article from: The Concise Oxford Dictionary of English Etymology aphelion (astron.) point of a planet's or comet's orbit at which it is farthest from the sun. XVII. Graecized form (Kepler) of modL. aphēlium , f. APO- + Gr. hélios SUN , after L. apogæum APOGEE . Read more
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Book article from: A Dictionary of Astronomy ...orbit lies entirely within that of the Earth (an aphelion of 0.98 astronomical units or less). The first...determined. The first confirmed apohele was 2003 CP 20 , aphelion 0.98 AU, and the second was 2004 JG 6 , aphelion 0.97 AU. Read more
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Book article from: A Dictionary of Astronomy ...asteroids . Their orbits have perihelia between 1.017 AU (Earth's aphelion distance) and 1.3 AU (the perihelion of Mars). Close approaches...semimajor axis of 1.920 AU, period 2.66 years, perihelion 1.09 AU, aphelion 2.75 AU, and inclination 11°.9. Amor group members show... Read more
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Book article from: A Dictionary of Astronomy ...asteroids . Their perihelion distances are 1.017 AU (Earth's aphelion) or less. Most Apollo asteroids are small (up to 5 km...semimajor axis of 1.471 AU, period 1.78 years, perihelion 0.65 AU, aphelion 2.30 AU, and inclination 6°.4. Apollo can approach to... Read more
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