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Book Sections Year : 2015

Itokawa Asteroid

Anny Chantal Levasseur-Regourd
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Itokawa is an S-type near-Earth asteroid, numbered 25143. This irregular object has been the first asteroidal target for a sample return mission: the JAXA Hayabusa-1 mission. It has established that Itokawa is very small (530 × 290 × 210 m) and has a density of about 1,900 kg/m−3, leading to a rather high porosity. It presents rough terrains scattered with boulders and smooth featureless areas, resulting from fine dust accumulated in local gravitational lows. Its shape suggests that it is a contact binary (as the nucleus of comet Hartley 2). Its density could indicate that it is built from loose-packed rocks, held together by their gravity. Samples of the asteroid have been brought back to Earth and are under analysis.
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insu-01161454 , version 1 (08-06-2015)



Anny Chantal Levasseur-Regourd. Itokawa Asteroid. Ricardo Amils, Muriel Gargaud, José Cernicharo Quintanilla, Henderson James Cleaves, William M. Irvine, Daniele Pinti, Michel Viso. Encyclopedia of Astrobiology, Springer Berlin Heidelberg, 1 p., 2015, ISBN : 978-3-642-27833-4. ⟨10.1007/978-3-642-27833-4_4029-3⟩. ⟨insu-01161454⟩
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