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

M. Viikinkoski , M. Kaasalainen (1) , J. Durech (2) , B. Carry (3, 4) , M. Marsset , T. Fusco (5) , C. Dumas (6) , W. J. Merline (7) , Bin Yang , J. Berthier (4) , P. Kervella (8, 9) , P. Vernazza (10)

1 Department of Mathematics [Tampere]
2 Astronomical Institute of Charles University
3 ESAC - European Space Astronomy Centre
4 IMCCE - Institut de Mécanique Céleste et de Calcul des Ephémérides
5 ONERA - The French Aerospace Lab [Châtillon]
6 CEFREM - Centre de Formation et de Recherche sur les Environnements Méditérranéens
7 Department of Space Studies [Boulder]
8 LFCA - Laboratoire Franco-Chilien d'Astronomie
9 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
10 LAM - Laboratoire d'Astrophysique de Marseille

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.

Domaines: Astrophysique [astro-ph]; Planète et Univers [physics]

M. Viikinkoski, M. Kaasalainen, J. Durech, B. Carry, M. Marsset, et al.. VLT/SPHERE- and ALMA-based shape reconstruction of asteroid (3) Juno. Astronomy and Astrophysics - A&A, 2015, 581, ⟨10.1051/0004-6361/201526626⟩. ⟨hal-01439941⟩