1991 BA is the closest and smallest asteroid yet observed outside the Earth's atmosphere. Reference.
The smallest known asteroid that has been discovered is called Hathor.
The smallest asteroid ever discovered is about 20 ft across
Even the smallest planet is larger than the largest asteroid.
Asteroid, moon, earth, sun.
Yes. Ceres is the largest asteroid in our solar system. It is also currently the smallest dwarf planet.
No. Ceres, the largest asteroid, is still far smaller than Mercury, the smallest planet.
1991 BA is the closest and smallest asteroid yet observed outside the Earth's atmosphere.---- Reference.http://www.nature.com/nature/journal/v354/n6351/abs/354287a0.html
Probably on the smallest asteroid.
Ceres. Its the smallest of the official dwarf planets, but largest of the asteroids. Its in the asteroid belt between Mars and Jupiter.
None. Even the smallest planets are larger than the largest asteroids.