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Regional unit definition for the nucleus of comet 67P/Churyumov-Gerasimenko on the SHAP7 model
Jorda, L.; Lamy, P. L.; Lara, L. M. +34 more
The previously defined regions on the nucleus of comet 67P/Churyumov-Gerasimenko have been mapped back onto the 3D SHAP7 model of the nucleus (Preusker et al., 2017). The resulting regional definition is therefore self-consistent with boundaries that are well defined in 3 dimensions. The facets belonging to each region are provided as supplementar…
ESA's Planetary Science Archive: Preserve and present reliable scientific data sets
De Marchi, G.; Besse, S.; Vallat, C. +15 more
The European Space Agency (ESA) Planetary Science Archive (PSA) is undergoing a significant refactoring of all its components to improve the services provided to the scientific community and the public. The PSA supports ESA's missions exploring the Solar System by archiving scientific peer-reviewed observations as well as engineering data sets. Th…
Gas flow in near surface comet like porous structures: Application to 67P/Churyumov-Gerasimenko
Hartogh, Paul; Thomas, Nicolas; Kührt, Ekkehard +6 more
We performed an investigation of a comet like porous surface to study how sub-surface sublimation with subsequent flow through the porous medium can lead to higher gas temperatures at the surface. A higher gas temperature of the emitted gas at the surface layer, compared to the sublimation temperature, will lead to higher gas speeds as the gas exp…
Water vapor deposition from the inner gas coma onto the nucleus of Comet 67P/Churyumov-Gerasimenko
Thomas, N.; Marschall, R.; Su, C. C. +4 more
Rosetta has detected water ice existing on the surface of Comet 67P/Churyumov-Gerasimenko in various types of features. One of particular interest is the frost-like layer observed at the edge of receding shadows during the whole mission, interpreted as the recondensation of a thin layer of water ice. Two possible mechanisms, (1) subsurface ice sub…
Virtual Planetary Space Weather Services offered by the Europlanet H2020 Research Infrastructure
André, N.; Budnik, E.; Grande, M. +25 more
Under Horizon 2020, the Europlanet 2020 Research Infrastructure (EPN2020-RI) will include an entirely new Virtual Access Service, "Planetary Space Weather Services" (PSWS) that will extend the concepts of space weather and space situational awareness to other planets in our Solar System and in particular to spacecraft that voyage through it. PSWS …
ROSETTA: How to archive more than 10 years of mission
A'Hearn, M. F.; Besse, S.; Taylor, M. G. G. T. +10 more
The Rosetta spacecraft was launched in 2004 and, after several planetary and two asteroid fly-bys, arrived at comet 67P/Churyumov-Gerasimenko in August 2014. After escorting the comet for two years and executing its scientific observations, the mission ended on 30 September 2016 through a touch down on the comet surface. This paper describes how t…