Itokawa

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Itokawa
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
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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
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