Pallas family
Template:Short description The Pallas family (adj. Palladian; FIN: 801Script error: No such module "Check for unknown parameters".) is a small asteroid family of B-type asteroids at very high inclinations in the intermediate asteroid belt.[1][2] The family was identified by Kiyotsugu Hirayama in 1928.
The namesake of the family is 2 Pallas, an extremely large asteroid with a mean diameter of about 512 km.[3] The remaining Palladian asteroids are far smaller; the largest is 5222 Ioffe with an estimated diameter of 22 km. This, along with the preponderance of the otherwise rare B spectral type among its members, indicates that this is likely a cratering family composed of ejecta from impacts on Pallas.
Another suspected Palladian is 3200 Phaethon, the parent body of the Geminid meteor shower.[4]
From the diagram, their proper orbital elements lie in the approximate ranges
| ap | ep | ip | |
|---|---|---|---|
| min | 2.71 AU | 0.25 | 32° |
| max | 2.79 AU | 0.31 | 34° |
At the present epoch, the range of osculating orbital elements of the members (by comparison to the MPCORB database [1]) is about
| a | e | i | |
|---|---|---|---|
| min | 2.71 AU | 0.13 | 30° |
| max | 2.79 AU | 0.37 | 38° |
References
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- A. Lemaitre & A. Morbidelli, Proper elements for highly inclined asteroidal orbits, Celestial Mechanics and Dynamical Astronomy, Vol. 60, pp. 29 (1994).
- Y. Kozai Secular perturbations of asteroids and comets In: Dynamics of the solar system; Proceedings of the Symposium, Tokyo, Japan, May 23–26, 1978. Dordrecht, D. Reidel Publishing Co., 1979, p. 231-236; Discussion, p. 236, 237.
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