MAN MADE OBJECTS ON ASTEROID 25143 ITOKAWA

Non-exhaustive list of artificial objects that have reached the surface of 25143 Itokawa, which is an Apollo-class asteroid orbiting the sun between Venus and Mars. This potato-shaped near-Earth object measures approximately 330 meters in diameter and is potentially hazardous.

Itokawa was visited by the JAXA sample-return mission Hayabusa in November 2005.

Estimated number of artificial objects: 6
Estimated total mass: 1.7 kg.

COSPAR IDname typemissionquantity on surfacedry mass (kg)statusdate/epoch (UTC)
2003-019HAYABUSA MARKER 1Target markerHAYABUSA, MUSES C1?0.3probably missed asteroid, heliocentric orbit?November 9, 2005
2003-019MINERVA OME-CDust coverHAYABUSA, MUSES C1?0.5discarded, probably missed asteroid, heliocentric orbit?November 12, 2005
2003-019MINERVAAsteroid roverHAYABUSA, MUSES C1?0.6probably missed asteroid, heliocentric orbit?November 12, 2005
2003-019AHAYABUSA MARKER 2Target markerHAYABUSA, MUSES C10.3deployed on the surfaceNovember 19, 2005
2003-019ASAMPLING PROJECTILES?Tantalum bulletHAYABUSA, MUSES C2?0.01fired, impact?November 25, 2005