Gaspra

Definition

Gaspra is an asteroid in the main asteroid belt between Mars and Jupiter. It was the first asteroid to be closely imaged by a spacecraft, specifically Galileo in 1991.

5 Must Know Facts For Your Next Test

1. Gaspra orbits the Sun with a semi-major axis of approximately 2.21 AU.
2. It measures about 18 kilometers in length.
3. The surface of Gaspra shows signs of cratering and ridges, indicating a history of impacts.
4. Galileo's flyby provided detailed images and data on Gaspra's composition and surface features.
5. Gaspra is classified as an S-type asteroid, meaning it has a silicate (stony) composition.

Review Questions

• What spacecraft provided the first close-up images of Gaspra?
• Describe one key characteristic of Gaspra's surface features.
• How is Gaspra classified in terms of its composition?

Related terms

Asteroid Belt: The region of space located between the orbits of Mars and Jupiter where most asteroids are found.

S-type Asteroids: A classification for asteroids that have a stony (silicate) composition.

Galileo Spacecraft: A NASA mission that studied Jupiter and its moons, and also conducted flybys of asteroids including Gaspra.