Journal
ASTRONOMY & ASTROPHYSICS
Volume 607, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201731798
Keywords
methods: data analysis; techniques: image processing; comets: individual: 67P/Churyumov Gerasimenko; planets and satellites: surfaces
Categories
Funding
- European Union's Horizon research and innovation programme [686709]
- national funding agency of Germany (DLR)
- national funding agency of France (CNES)
- national funding agency of Italy (ASI)
- national funding agency of Spain (MEC)
- national funding agency of Sweden (SNSB)
- ESA Technical Directorate
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We performed a stereo-photogrammetric (SPG) analysis of more than 1500 Rosetta/OSIRIS NAC images of comet 67P/ChuryumovGerasimenko (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-perihelion description and replaces the previous SPG SHAP4S shape model. From the new shape model, some measures for 67P with very low 3 sigma uncertainties can be retrieved: 18.56 km(3) +/- 0 : 02 km(3) for the volume and 537.8 kg/m(3) +/- 0.7 kg/m(3) for the mean density assuming a mass value of 9 : 982 +/- 10(12) kg.
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