Asteroid
The first asteroid ever seen up close, imaged by the Galileo spacecraft during its 1991 flyby on the way to Jupiter.
| Type | Asteroid |
|---|---|
| Distance from the Sun | 2.21 AU |
| Diameter | 12 km |
| Mass | 2.50 × 10^15 kg |
| Temperature | -83°C |
| Orbital period | 1,200 days |
| Apparent magnitude | 12.4 |
| Redshift | 0 |
| Discovered | 1916 |
At 12 km across, 951 Gaspra is less than a thousandth of the diameter of Earth.
Its mass is less than a thousandth of the mass of Earth.
It keeps an average distance of 2.21 AU from the Sun, so sunlight takes 18 minutes to reach it.
A single orbit takes 3.3 years.
An average temperature of 190 K works out at -83 degrees Celsius, colder than the 15 degrees Earth averages.
It has been on record since 1916.
Play today's Cosmodle