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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 Ekkehard Kührt 1 Maurizio Pajola 2 Nilda Oklay 1 Jean-Baptiste Vincent 1 Björn Davidsson 3 Michael F. A'Hearn 4 Jessica Agarwal 5 Cesare Barbieri 6 Maria Antonella Barucci 7 Jean-Loup Bertaux 8 Ivano Bertini 9 Gabriele Cremonese 10 Vania da Deppo 11 Stefano Debei 12 Mariolino de Cecco 13 Sonia Fornasier 7 Marco Fulle 14 Olivier Groussin 15 Pedro J. Gutiérrez 16 Carsten Güttler 5 Wing-Huen Ip 17, 18 Laurent Jorda 15 Horst Uwe Keller 19, 1 Detlef Koschny 20 J. Rainer Kramm 5 Michael Küppers 21 Philippe Lamy 15 Luisa-Maria Lara 16 Monica Lazzarin 6 José-Juan López-Moreno 16 Francesco Marzari 6 Matteo Massironi 9 Giampiero Naletto 9, 11, 22 Hans Rickman 3, 23 Rafael Rodrigo 24, 25 Holger Sierks 5 Nicholas Thomas 26 Cécilia Tubiana 5
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
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Submitted on : Thursday, November 9, 2017 - 2:26:58 PM
Last modification on : Thursday, April 2, 2020 - 1:28:23 PM

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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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