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Gaspra
Gaspra Asteroid 951, discovered in 1916 by the Russian astronomer Grigorii Nikolaevich Neujmin (1886–1946). It was the first asteroid to be seen in detail, when the Galileo probe flew within 1600 km of it in 1991. Gaspra, an S-class asteroid, is irregularly shaped with dimensions of 18.2 × 10.4 × 8.8 km, and is probably a fragment of a much larger body. Its rotation period is 7.04 hours. As well as craters, Gaspra's surface has linear grooves similar to those on Mars's satellite Phobos. Gaspra's orbit has a semimajor axis of 2.210 AU, period 3.28 years, perihelion 1.83 AU, aphelion 2.59 AU, and inclination 4°.1.
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"Gaspra." A Dictionary of Astronomy. 1997. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "Gaspra." A Dictionary of Astronomy. 1997. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O80-Gaspra.html "Gaspra." A Dictionary of Astronomy. 1997. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-Gaspra.html |
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Gaspra
Gaspra A solar system asteroid (No. 951), measuring 19 × 12 × 11 km; approximate mass 1016 kg; rotational period 7.042 hours; orbital period 3.29 years. It was imaged by Galileo in October 1991.
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AILSA ALLABY and MICHAEL ALLABY. "Gaspra." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "Gaspra." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O13-Gaspra.html AILSA ALLABY and MICHAEL ALLABY. "Gaspra." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Gaspra.html |
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