The spacecraft Hayabusa, which was launched in 2003, arrived at its destination, asteroid (25143) Itokawa in September 2005. The appearance of Itokawa, a small S-type near Earth asteroids, was totally unexpected. The surface is covered with a lot of boulders and there are only a few craters on it. It looks like a contact binary asteroid. The surface composition is quite similar to LL-chondrite. The estimated density is 1.9 ± 0.13 (g/cm3), so the macro-porosity is about 40%. This means that Itokawa is a rubble pile object. In Itokawa, we may see such things that are very close to building blocks of asteroids. In this paper, we review the mission and the first scientific results.

On 1973 November 23, there was a close approach (0.013AU) between (704) Interamnia as the fifth largest minor planet, and (993) Moultona. It was made an attempt to determine the mass of Interamnia from its perturbations on the motion of Moultona, using 82 right ascensions, 72 declinations, and of 1 observation the portion normal to the apparent motion, from altogether 95 observations from 22 oppositions 1923 January to 1991 February with a mean error of 0.″51. For the mass of Interamnia was obtained a result of 0.37 ± 0.17 · 10-10 solar masses. Although its uncertainty, this result gives an independent information about the mass of Interamnia besides the estimation from the diameter and the suspected density, considering the uncertainty of these parameters.