The global meter-level shape model of comet 67P/Churyumov-Gerasimenko
Journal
Date Issued
2017
Author(s)
Preusker, F.
•
Scholten, F.
•
Matz, K. -D.
•
Roatsch, T.
•
Hviid, S. F.
•
Mottola, S.
•
Knollenberg, J.
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Kührt, E.
•
•
Oklay, N.
•
Vincent, J. -B.
•
Davidsson, B.
•
A'Hearn, M. F.
•
Agarwal, J.
•
Barbieri, C.
•
Barucci, M. A.
•
Bertaux, J. -L.
•
Bertini, I.
•
•
Da Deppo, V.
•
Debei, S.
•
De Cecco, M.
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Fornasier, S.
•
•
Groussin, O.
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Gutiérrez, P. J.
•
Güttler, C.
•
Ip, W. -H.
•
Jorda, L.
•
Keller, H. U.
•
Koschny, D.
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Kramm, J. R.
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Küppers, M.
•
Lamy, P.
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Lara, L. M.
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Lazzarin, M.
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Lopez Moreno, J. J.
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Marzari, F.
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Massironi, M.
•
Naletto, G.
•
Rickman, H.
•
Rodrigo, R.
•
Sierks, H.
•
Thomas, N.
•
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.
Volume
607
Start page
L1
Issn Identifier
0004-6361
Ads BibCode
2017A&A...607L...1P
Rights
open.access
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