VLT/SPHERE- and ALMA-based shape reconstruction of asteroid (3) Juno
Abstract
We use the recently released Atacama Large Millimeter Array (ALMA) and VLT/SPHERE science verification data, together with earlier adaptive-optics images, stellar occultation, and lightcurve data to model the 3D shape and spin of the large asteroid (3) Juno with the all-data asteroid modelling (ADAM) procedure. These data set limits on the plausible range of shape models, yielding reconstructions suggesting that, despite its large size, Juno has sizable unrounded features moulded by non-gravitational processes such as impacts.
Based on observations collected at the European Southern Observatory, Paranal, Chile (prog. ID: 60.A-9379, 086.C-0785), and at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation.- Publication:
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Astronomy and Astrophysics
- Pub Date:
- September 2015
- DOI:
- 10.1051/0004-6361/201526626
- Bibcode:
- 2015A&A...581L...3V
- Keywords:
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- instrumentation: interferometers;
- instrumentation: adaptive optics;
- methods: numerical;
- minor planets;
- asteroids: individual: (3) Juno