- Additional Information
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Additional Information
Short Description Pallas, minor-planet designation 2 Pallas, is the second asteroid to have been discovered (after Ceres), and it is one of the largest asteroids in the Solar System. It is likely a remnant protoplanet. t was formerly considered a possible dwarf planet due to its size, but it is no longer considered such due to having significant departures from an ellipsoid. 2 Pallas - Wikipedia, the free encyclopedia Discovered by Heinrich Wilhelm Olbers Discovery date 28 March 1802 Type Asteroid AddInfo Pallas family Satellite of Sun Minor planet number 2 Orbit Prograde Rotation Direct Apoapsis 09 510 400 000 km Periapsis 09 318 900 000 km Semi-major axis 09 414 700 000 km Distance from Sun 01 2.771 606 11 au Eccentricity 0.231 273 63 Orbital period 4.614296176 year | 1685.371678 days Orbital speed 02 17.65 km/s Mean anomaly 078.228 704° Inclination to the ecliptic 034.840 998° Longitude of the ascending node 173.096248° Argument of periapsis 309.930328° Diameter/Size 03 512 ± 6 km Dimensions 550 × 516× 476 km Mass 1020×2.11 kg Density 01 3.0 ± 0.5 g/cm3 Surface gravity 0.21 m/s2 | 0.022 g Escape velocity 03 330 m/s Rotation period 7.813 221 hour | 0.325 550 days Equatorial rotation velocity 02 65 m/s Axial tilt 084°±5 Albedo geometric 0.159 Temperature mean 03 164 K Temperature max 03 265 K Apparent magnitude 6.49 to 10.65 Absolute magnitude 4.13 Angular diameter 0.629″ to 0.171″ - Comments
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