Period of revolution (length of year)

1681 Earth days or 4.60 Earth years

Rotation period

9.07 hours

Orbital velocity

17.9 km/s

Axial tilt

Average temperature



Tenuous, may have some water vapour

Strength of gravity

0.27 N/kg

Astronomers are not certain how the asteroids originated, but many believe they are part of the solar nebula that failed to form a planet because of the strong gravitational pull of the planet Jupiter. Others believe the asteroids are the remains of a planet that was pulled apart. This is unlikely, since if all the asteroids were combined into a single planet it would have a diameter of only 1500 km. Thus it is more likely that the asteroids are the remains of rocky bodies that have survived from the early solar system.

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