[en] High angular resolution disk-resolved images of (7) Iris collected by VLT/SPHERE instrument allowed for the detailed shape modelling of this large asteroid revealing its surface features. If (7) Iris did not suffer any events catastrophic enough to disrupt the body (which is very likely) by studying its topography we might get insights into the early Solar System's collisional history. When it comes to internal structure and composition, thoroughly assessing the volume and density uncertainties is necessary. In this work we propose a method of uncertainty calculation of asteroid shape models based on lightcurve and Adaptive Optics images. We apply this method on four models of (7) Iris produced from independent SAGE and ADAM inversion techniques and photoclinometry (MPCD). Obtained diameter uncertainties stem from both the observations from which the models were scaled and the models themselves. We show that despite the availability of high resolution AO images, the volume and density of (7) Iris have substantial error bars that were underestimated in the previous studies.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Dudziński, G.; Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
Podlewska-Gaca, E.; Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
Bartczak, P.; Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
Benseguane, S.; LGL-TPE, UMR 5276, CNRS, Claude Bernard Lyon 1 University, ENS Lyon, Villeurbanne Cedex, France
Ferrais, Marin ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Jorda, L.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Hanuš, J.; Institute of Astronomy, Charles University, Prague, V Holešovičkách 2, CZ-18000, Prague 8, Czech Republic
Vernazza, P.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Rambaux, N.; IMCCE, CNRS, Observatoire de Paris, PSL Université, Sorbonne Université, Paris, France
Carry, B.; Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, France
Marchis, F.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Marsset, M.; Department of Earth, Atmospheric and Planetary Sciences, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Viikinkoski, M.; Mathematics and Statistics, Tampere University, 33720 Tampere, Finland
Brož, M.; Institute of Astronomy, Charles University, Prague, V Holešovičkách 2, CZ-18000, Prague 8, Czech Republic
Fetick, R.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Drouard, A.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Fusco, T.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Birlan, M.; IMCCE, CNRS, Observatoire de Paris, PSL Université, Sorbonne Université, Paris, France
Jehin, Emmanuel ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Berthier, J.; IMCCE, CNRS, Observatoire de Paris, PSL Université, Sorbonne Université, Paris, France
Castillo-Rogez, J.; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Cipriani, F.; European Space Agency, ESTEC - Scientific Support Office, Keplerlaan 1, Noordwijk 2200 AG, The Netherlands
Colas, F.; IMCCE, CNRS, Observatoire de Paris, PSL Université, Sorbonne Université, Paris, France
Dumas, C.; TMT Observatory, 100 W. Walnut Street, Suite 300, Pasadena, CA 91124, USA
Kryszczynska, A.; Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
Lamy, P.; Laboratoire Atmosphéres, Milieux et Observations Spatiales, CNRS & UVSQ, 11 Bd d'Alembert, 78280 Guyancourt, France
Le Coroller, H.; Aix Marseille Université, CNRS, CNES, Laboratoire d'Astrophysique de Marseille, Marseille, France
Marciniak, A.; Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
Michalowski, T.; Astronomical Observatory Institute, Faculty of Physics, Adam Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
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