ASTEROIDS

Gaspra1 The size of asteroid 951 Gaspra is 12 X 7.5 X 7 miles. This image was taken by the Galileo spacecraft from a distance of about 3,300 miles.
Gaspra2 Gaspra rotates once in 7 hours 3 minutes. The earliest image here was taken 5.75 hours before closest approach from a distance of 102,000 miles. The last image was taken only 30 minutes before closest approach from a distance of 10,000 miles.
Ida1 This image of asteroid 243 Ida was taken by the Galileo spacecraft. Ida is about 35 miles long.
Ida2 Ida rotates once every 4 hours 39 minutes.
Ida3 This image shows Ida with its small moon, Dactyl! The image was taken 14 minutes before closest approach on August, 28, 1993 from a distance of about 6,500 miles.
Dactyl1 Ida's moon, Dactyl, is .75 X .87 X 1 mile in size. The large crater is about 300 meters across.
Eros1 This image of asteroid 433 Eros was taken on February 14, 2000 by the NEAR spacecraft from a distance of 210 miles. Features as small as 100 feet in diameter can be seen. The image shows a 3 mile-wide impact crater with two smaller 1.2 mile-diameter craters on the larger crater's rim. There is a 170 foot-diameter boulder   sitting on the large crater's floor! NEAR is the first spacecraft to enter a bound orbit around an asteroid.
Eros2 This 12-image sequence was taken over a 5 hour period and shows Eros rotating. Eros is about 21 X 8 X 8 miles in size.
Eros3 Here are more of the first pictures of Eros taken from the orbiting NEAR spacecraft.
Mathilde1 This image of asteroid 253 Mathilde was taken by the Near spacecraft from a distance of 1,500 miles on   June 27, 1997. The portion of Mathilde displayed in this image is 36 X 29 miles.
Eros4 3D Asteroid Eros in 3D.
Eros5 Here are the two opposite sides of Eros imaged from a range of 220 miles by the Near spacecraft.
Eros6 Low-orbit images of Eros  have shown an amazing abundance of boulders of all sizes strewn across the asteroid's surface. This image was taken on May 14, 2000, from an orbital altitude of 50 kilometers (31 miles). The scene is about 1.8 kilometers (1.1 miles) across and includes features as small as 4 meters (13 feet). The field of boulders at the upper right is one of the rockiest parts of Eros discovered so far. The largest of the boulders is about 60 meters (197 feet) in diameter, nearly two-thirds the length of a football field.
Eros7 This picture caught a spectacular view of a horizon sculpted by worn, degraded craters and punctuated by jagged boulders. The angular boulder at the center of the frame is about 60 meters (197 feet)  tall, or two-thirds the length of a football field. Angular rocks are very common in nature; the corners form as a rock is chipped out of a larger mass.  This image was taken May 18, 2000, from an orbital altitude of 50 kilometers (31 miles). The whole scene is about 1.4 kilometers (0.8 miles) across, and it shows features as small as 4 meters (13 feet).
Eros8 This image, taken June 6, 2000 from an altitude of 30 miles shows the bottom of a large 3.3 mile-diameter crater in spectacular detail! The scene is about 0.9 miles across.
Eros9 This image, taken July 12, 2000 from an altitude of 24 miles looks down the length of the irregularly shaped asteroid and shows near, middle, and far horizons! The scene is 0.5 miles across.
Eros10 This image was taken 10/26/00 from a distance of 6 miles! The view is 350 meters wide, and the large boulder at right is 25 meters across.
Eros11 This image was taken 10/26/00 from a distance of 4.3 miles! The view is 350 meters wide, and the large boulder in the lower right is 15 meters across. The smallest visible rocks are only 1.4 meters wide!
Eros12 A mosaic of images from the close flyover of Eros. The closest approach altitude was only 4 miles!
Eros13 A spectacular series of images taken on February 12, 2001 during the final moments before the NEAR spacecraft landed on Eros!
Kuiper Sizes Relative sizes of asteroids in the Kuiper Belt.
Quaoar The discovery of an asteroid more than half the size of Pluto was announced in October, 2002. The asteroid is named Quaoar, and it orbits at a distance slightly greater than Pluto's distance from the Sun.