25143 Itokawa

25143 Itokawa
Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)
Discoverer LINEAR
Discovery date September 26, 1998
Alternate
designations
1998 SF36 B (http://cfa-www.harvard.edu/iau/MPDes.html)
Category Apollo asteroid,
Mars-crosser asteroid
Orbital elements C (http://asteroid.lowell.edu/)
Epoch 21 March, 2005 (JD 53450)
Eccentricity (e) 0.280078
Semi-major axis (a) 1.32388 AU
Perihelion (q) 0.9531 AU
Aphelion (Q) 1.6947 AU
Orbital period (P) 1.5233 a (556.38 d)
Mean orbital speed unknown
Inclination (i) 1.622°
Longitude of the
ascending node
(Ω)
69.095°
Argument of
perihelion
(ω)
162.756°
Mean anomaly (M) 197.445°
Physical characteristics
Dimensions 607x287x264 km
Mass unknown
Density unknown
Surface gravity unknown
Escape velocity unknown
Rotation period 0.5055 d
Spectral class unknown
Absolute magnitude 18.957
Albedo 0.53
Mean surface
temperature
unknown

25143 Itokawa is an Apollo and Mars-crosser asteroid discovered in 1998 by LINEAR. It is named after Hideo Itokawa, a Japanese rocket scientist.

Itokawa is believed to be an S-type asteroid in composition. It has been imaged by radar astronomy at Goldstone, revealing a somewhat elongated shape and a 12.5 hour rotation period. [1] (http://echo.jpl.nasa.gov/~ostro/itokawa.html)

Itokawa is the target of the Japanese Hayabusa space probe, which will land on and take samples of the asteroid's surface in 2005.

Radar images of asteroid Itokawa
Enlarge
Radar images of asteroid Itokawa


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(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.)
fr:(25143) Itokawa

de:Itokawa ja:糸川 (小惑星)

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