- Additional Information
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Additional Information
Short Description Itokawa is an Apollo and Mars-crosser asteroid. It was the first asteroid to be the target of a sample return mission, the Japanese space probe Hayabusa, and the smallest asteroid photographed by a spacecraft. The Hayabusa mission confirmed these findings and also suggested that Itokawa may be a contact binary formed by two or more smaller asteroids that have gravitated toward each other and stuck together. 25143 Itokawa - Wikipedia, the free encyclopedia Discovered by Lincoln Near-Earth Asteroid Research Discovery date 26 September 1998 Type Asteroid AddInfo Apollo group Satellite of Sun Minor planet number 25143 Orbit Prograde Rotation Direct Apoapsis 09 253 520 000 km Periapsis 09 142 568 000 km Semi-major axis 09 198 044 000 km Distance from Sun 01 1.324 au Eccentricity 0.280 Orbital period 1.52 year | 556.355 days Orbital speed 02 25.37 km/s Mean anomaly 294.502° Inclination to the ecliptic 001.622° Longitude of the ascending node 069.095° Argument of periapsis 162.760° Diameter/Size 0.33 km Dimensions 535 × 294 × 209 m Mass 1010×3.51 kg Density 01 1.9 g/cm3 Surface gravity 0.0001 m/s2 Escape velocity 0.2 m/s Rotation period 0.5055 days | 12.132 hours Albedo geometric 0.53 Temperature mean 03 206 K | −67 °C Absolute magnitude 19.2 - Comments
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