Pallas
Pallas is the third-largest asteroid in the Solar System by volume and mass. It is the second asteroid to have been discovered, after Ceres, and is likely a remnant protoplanet. Like Ceres, it is believed to have a mineral composition similar to carbonaceous chondrite meteorites, though significantly less hydrated than Ceres. It is 79% the mass of Vesta and 22% the mass of Ceres, constituting an estimated 7% of the total mass of the asteroid belt. Its estimated volume is equivalent to a sphere 507 to 515 kilometers in diameter, 90–95% the volume of Vesta.
asteroid
Entdeckt: 1804-08-27
Beobachtungen: 9,772
Pallas is the third-largest asteroid in the Solar System by volume and mass. It is the second asteroid to have been discovered, after Ceres, and is likely a remnant protoplanet. Like Ceres, it is believed to have a mineral composition similar to carbonaceous chondrite meteorites, though significantly less hydrated than Ceres. It is 79% the mass of Vesta and 22% the mass of Ceres, constituting an estimated 7% of the total mass of the asteroid belt. Its estimated volume is equivalent to a sphere 507 to 515 kilometers in diameter, 90–95% the volume of Vesta.
Bahnparameter
Halbachse
2.77 AU
Exzentrizität
0.2307
Perihel
2.131 AU
Aphel
3.409039 AU
Inklination
34.93°
Umlaufzeit
4.5996 yr
Äon
2461200.5
Mittlere Anomalie
254.25°
Orbit diagram
The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.
Physikalische Parameter
Durchmesser
513.0 km
Albedo
0.155
Dichte
2.89 g/cm³
Rotationszeit
7.8132214 h
Absolute Helligkeit
4.12
Bahnqualität
RMS
0.35838
Zustandscode
0
Bahn-ID
—
