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Families classification including multiopposition asteroids

Published online by Cambridge University Press:  01 March 2016

Andrea Milani ,
Federica Spoto ,
Zoran Knežević ,
Bojan Novaković  and
Georgios Tsirvoulis
Andrea Milani
Affiliation:
Dipartimento di Matematica, Universita di Pisa, Largo B. Pontecorvo 5, Pisa, Italy email: [email protected]
Federica Spoto
Affiliation:
Dipartimento di Matematica, Universita di Pisa, Largo B. Pontecorvo 5, Pisa, Italy email: [email protected] SpaceDyS s.r.l., via Mario Giuntini 63, Cascina, Italy
Zoran Knežević
Affiliation:
Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia
Bojan Novaković
Affiliation:
Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
Georgios Tsirvoulis
Affiliation:
Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia
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Abstract

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In this paper we present the results of our new classification of asteroid families, upgraded by using catalog with > 500,000 asteroids. We discuss the outcome of the most recent update of the family list and of their membership. We found enough evidence to perform 9 mergers of the previously independent families. By introducing an improved method of estimation of the expected family growth in the less populous regions (e.g. at high inclination) we were able to reliably decide on rejection of one tiny group as a probable statistical fluke. Thus we reduced our current list to 115 families. We also present newly determined ages for 6 families, including complex 135 and 221, improving also our understanding of the dynamical vs. collisional families relationship. We conclude with some recommendations for the future work and for the family name problem.

Keywords

Asteroids: dynamicsCollisional evolutionNon-gravitational perturbations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 28 - 45
Copyright
Copyright © International Astronomical Union 2016 

References

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