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.

The global meter-level shape model of comet 67P/Churyumov-Gerasimenko / Preusker, F., Scholten, F., Matz, K.-D., Roatsch, T., Hviid, S.F., Mottola, S., Knollenberg, J., Kührt, E., Pajola, M., Oklay, N., Vincent, J.-B., Davidsson, B., A'Hearn, M.F., Agarwal, J., Barbieri, C., Barucci, M.A., Bertaux, J.-L., Bertini, I., Cremonese, G., Da Deppo, V., et al.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 607:(2017). [10.1051/0004-6361/201731798]

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

Debei, S.;De Cecco, M.;
2017-01-01

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.
2017
Preusker, F.; Scholten, F.; Matz, K. -D.; Roatsch, T.; Hviid, S. F.; Mottola, S.; Knollenberg, J.; Kührt, E.; Pajola, M.; Oklay, N.; Vincent, J. -B.; ...espandi
The global meter-level shape model of comet 67P/Churyumov-Gerasimenko / Preusker, F., Scholten, F., Matz, K.-D., Roatsch, T., Hviid, S.F., Mottola, S., Knollenberg, J., Kührt, E., Pajola, M., Oklay, N., Vincent, J.-B., Davidsson, B., A'Hearn, M.F., Agarwal, J., Barbieri, C., Barucci, M.A., Bertaux, J.-L., Bertini, I., Cremonese, G., Da Deppo, V., et al.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 607:(2017). [10.1051/0004-6361/201731798]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/197008
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