VLT/SPHERE- and ALMA-based shape reconstruction of asteroid (3) Juno Article - Septembre 2015

M. Viikinkoski, M. Kaasalainen, J. Durech, B. Carry, M. Marsset, T. Fusco, C. Dumas, W. J. Merline, Bin Yang, J. Berthier, P. Kervella, P. Vernazza

M. Viikinkoski, M. Kaasalainen, J. Durech, B. Carry, M. Marsset, T. Fusco, C. Dumas, W. J. Merline, Bin Yang, J. Berthier, P. Kervella, P. Vernazza, « VLT/SPHERE- and ALMA-based shape reconstruction of asteroid (3) Juno  », Astronomy and Astrophysics - A&A, septembre 2015. ISSN 0004-6361

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.

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