Because Itokawa's rotation axis is perpendicular to the ecliptic plane, AMICA enabled global coverage without polar night regions during a rendezvous that lasted less than half of the orbital time of Itokawa. While the 2001 images showed a nearly ellipsoidal shape devoid of The position of Itokawa is indicated by a ◯ pink circle. The images cover a complete rotation of the asteroid.As part of the \"Planet and Asteroid Natural Scene Generation Utility\" (PANGU) v4 validation campaign, an ICQ shape model of Itokawa was imported into PANGU. [3] It has a low Earth minimum orbital intersection distance of 0.0131 AU (1,960,000 km), which corresponds to 5.1 lunar distances. report "OH and H2O" apparently formed by implantation of solar wind hydrogen. The sample capsule was returned to Earth and landed at Woomera, South Australia on 13 June 2010, around 13:51 UTC (23:21 local). [33] Dust collected from the asteroid surface is thought to have been exposed there for about eight million years. After its return to Earth in 2010, the mineralogy, petrography, chemistry, and isotope ratios of these particles have been studied in detail, providing insights into the evolution of the Solar System. It was last officially observed on Feb. 4, 2019. It completes a rotation on its axis every 12.13 days. Based on Yarkovsky–O'Keefe–Radzievskii–Paddack effect measurements, a small section of Itokawa is estimated to have a density of 2.9 g/cm3, whereas a larger section is estimated to have a density of 1.8 g/cm³. Approx. It’s not a matter of if, but when. https://doi.org/10.1016/j.icarus.2006.12.014. This is an extremely rapid rotation rate evolution, and if verified would imply that YORP rotational acceleration is a dominating effect for small NEAs. On 25 November, a second landing and sampling sequence was attempted. Copyright © 2007 Elsevier Inc. All rights reserved. [38], S. M. Lederer, et al., Physical characteristics of Hayabusa target Asteroid 25143 Itokawa, Icarus, v. 173, p. 153–165 (2005), CS1 maint: BOT: original-url status unknown (, Last edited on 27 September 2020, at 16:41, Lincoln Laboratory's Experimental Test Site, Institute of Space and Astronautical Science, Yarkovsky–O'Keefe–Radzievskii–Paddack effect, "JPL Small-Body Database Browser: 25143 Itokawa (1998 SF36)", "The Rubble-Pile Asteroid Itokawa as Observed by Hayabusa", "ExploreNEOs. Itokawa orbits the Sun at a distance of 0.95–1.70 AU once every 18 months (557 days; semi-major axis of 1.32 AU). It was the first asteroid to be the target of a sample return mission, the Japanese Hayabusa space probe, which collected more than 1500 regolith dust particles from the asteroid's surface in 2005.

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