The global meter-level shape model of comet 67P/Churyumov-Gerasimenko

Frank Preusker 1 F. Scholten 1 K.-D. Matz 1 T. Roatsch 1 S. F. Hviid 1 S. Mottola 1 Jörg Knollenberg 1 Ekkerhard Kührt 1 Maurizio Pajola 2 Nilda Oklay 3 Jean-Baptiste Vincent 3 Björn Davidsson 4 Michael F. A’hearn 5 Jessica Agarwal 6 Cesare Barbieri 7 Maria Antonella Barucci 8 Jean-Loup Bertaux 9 Ivano Bertini 10 Gabriele Cremonese 11 Vania Da Deppo 12 Stefano Debei 13 Mariolino De Cecco 14 Sonia Fornasier 8 Marco Fulle 15 Olivier Groussin 16 Pedro J. Gutierrez 17 Carsten Güttler 6 Wing-Huen Ip 18, 19 Laurent Jorda 16 Horst Uwe Keller 20, 3 Detlef Koschny 21 J. Rainer Kramm 6 Michael Küppers 22 Philippe Lamy 16 Luisa-Maria Lara 17 Monica Lazzarin 7 José-Juan López-Moreno 17 Francesco Marzari 7 Matteo Massironi 10 Giampiero Naletto 10, 12, 23 Hans Rickman 4, 24 Rafael Rodrigo 25, 26 Holger Sierks 6 Nicholas Thomas 27 Cécilia Tubiana 6
Abstract : We performed a stereo-photogrammetric (SPG) analysis of more than 1500 Rosetta/OSIRIS NAC images of comet 67P/Churyumov-Gerasimenko (67P). The images with pixel scales in the range 0.2−3.0 m/pixel were acquired between August 2014 and February 2016. We finally derived a global high-resolution 3D description of 67P’s surface, the SPG SHAP7 shape model. It consists of about 44 million facets (1−1.5 m horizontal sampling) and a typical vertical accuracy at the decimeter scale. Although some images were taken after perihelion, the SPG SHAP7 shape model can be considered a pre-periheliondescription and replaces the previous SPG SHAP4S shape model. From the new shape model, some measures for 67P with very low 3σ uncertainties can be retrieved: 18.56 km3 ± 0.02 km3 for the volume and 537.8 kg/m3 ± 0.7 kg/m3 for the mean density assuming a mass value of 9.982 × 1012 kg.
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https://hal-insu.archives-ouvertes.fr/insu-01631548
Contributeur : Catherine Cardon <>
Soumis le : jeudi 9 novembre 2017 - 14:26:58
Dernière modification le : mercredi 28 mars 2018 - 13:20:03

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Frank Preusker, F. Scholten, K.-D. Matz, T. Roatsch, S. F. Hviid, et al.. The global meter-level shape model of comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics - A&A, EDP Sciences, 2017, 607 (November), L1 (5 p.). 〈10.1051/0004-6361/201731798〉. 〈insu-01631548〉

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