 |
|
|
|
| Average distance from the Sun | 429.15 million km |
| Diameter | 58 x 23 km |
| Mass | 4.2e16 kg |
| Orbital period around the Sun | 4.84 Earth years / 1,768 Earth days |
| Number of moons | 1, Dactyl |
 |
|
| Ida was the second asteroid to be observed close up by a spacecraft, when the Space Probe Galileo took pictures as it flew by on Aug 28, 1993. These pictures showed not only that Ida has a cratered surface, but also that it has a small moon called Dactyl, which is about 1.6 x 1.2 km in diameter and orbiting 90 km away from the asteroid. | |
Our Solar System
Our solar system is located on the edge of a spiral arm called Orion’s Arm, and is one-half to two-thirds of the way (28,000 light-years) from the center of our Milky Way galaxy.The Sun, Sol
The Inner Planets
Mercury
Venus
Earth
The Moon
Mars
The Asteroid Belt
Dwarf planet, Ceres
Asteroid, Ida
Asteroid, Vesta
Asteroid, Eros
The Outer Planets
Jupiter
Saturn
Uranus
Neptune
The Kuiper Belt
Dwarf planet, Pluto
Dwarf planet, Eris
The Oort Cloud
Dwarf planet, Sedna
Comet Halley
Comet Hale-Bopp
Glossary of Terms
