1 day / second

0.5 AU

2 Pallas

Asteroid

A massive, highly inclined main-belt asteroid that ranks among the largest known objects in the asteroid belt and exhibits an unusually bright surface due to its primitive, carbon-poor composition.

Key Facts

orbital regime

Asteroid Belt

learn more

Wikipedia

mass

2.0400e+20 kg

radius

256 km

hill radius

103,444 km

semi-major axis

2.767 AU

eccentricity

0.23

inclination

34.93º

longitude of the ascending node

172.9º

argument of periapsis

310.9º

orbital period

4.604 years

surface gravity

0.021 g

discovery date

March 28, 1802

discovered by

Heinrich Wilhelm Olbers in Bremen

name origins

Named after Pallas Athena, the Greek goddess of wisdom

dimensions

513 kilometers in diameter

albedo

0.101-0.155

material composition

B-type asteroid

density

2.89-3.0 g/cm³
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