Bibcode
Lacerda, P.; Ali-Lagoa, V.; Licandro, J.; Peixinho, N.
Bibliographical reference
European Planetary Science Congress 2015, held 27 September - 2 October, 2015 in Nantes, France, Online at http://meetingorganizer.copernicus.org/EPSC2015, id.EPSC2015-691
Advertised on:
10
2015
Citations
0
Refereed citations
0
Description
We will present results of a survey of Hilda asteroids to look for
extreme shape objects. We used WISE [1, 2] sparse IR photometry to
identify objects with high photometric variability in different bands.
Highly variable candidates were targeted by densely sampled, follow-up
ground-based photometry. Similar strategies were successfully used to
identify extreme shape objects among Jovian Trojans [3] (see Fig. 1) and
Kuiper belt objects [4]. These surveys found high intrinsic abundances
of highly variable objects in both population and led to the discovery
of contact binaries. Contact binaries and extreme shape objects are
useful as they permit useful bulk density estimates [5, 6] which in the
long run can be used to, e.g., trace differences in the bulk composition
of different populations. Repeated variability observations of candidate
contact binaries among Hilda asteroids will be used to measure their
obliquity, which may shed light on how these objects formed [7].