Pallas

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Pallas
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
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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″
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