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Thermal Properties of the Surface of 67P/Chryumov-Gerasimenko: Initial Results

Capria, M. T. and Tosi, F. and Kührt, E. and Raponi, A. and Formisano, M. and De Sanctis, M.C. and Capaccioni, F. and Filacchione, G. and Palomba, E. and Longobardo, A and Ciarnello, M. and Bockelee-Morvan, D. and Erard, S. and Leyrat, C. and Drossart, P. and Arnold, Gabriele (2014) Thermal Properties of the Surface of 67P/Chryumov-Gerasimenko: Initial Results. In: Eos Trans. AGU, Fall Meet. Suppl., P41C-3951-P41C-3951. AGU Fall meeting, 15 Dec - 19 Dec 2014, San Francisco, California (USA).

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Official URL: https://agu.confex.com/agu/fm14/meetingapp.cgi/Paper/21134

Abstract

The imaging spectrometer VIRTIS onboard Rosetta (Coradini et al., 2007) acquires spectra in the range from the near-UV through the IR (0.25-5 micron). Infrared spectra are affected by thermal emission from the surface of the comet, so the measured radiance in that spectral region can be used to retrieve surface temperatures and spectral emissivities by means of temperature-retrieval algorithms (Tosi et al., 2014, Erard, 2014). The temperature of a surface, and in particular its variation with respect to illumination conditions, depends strongly on the thermal inertia of the materials composing this surface and the sub-surface, but also on the topography and small scale roughness. Theoretical codes computing surface and subsurface temperatures under a range of different assumptions on the composition, activity and physical status of the surface matter are used to reproduce the IR radiances observed, and the apparent/effective thermal inertia determined in this way is assumed to correspond to reality (Capria et al., 2014). The initial results obtained using the data acquired during the approach and pre-landing (July 2014-November 2014) first phases of the Rosetta mission will be presented. Authors acknowledge the funding from Italian, German and French Space Agencies.

Item URL in elib:https://elib.dlr.de/101356/
Document Type:Conference or Workshop Item (Speech)
Title:Thermal Properties of the Surface of 67P/Chryumov-Gerasimenko: Initial Results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Capria, M. T.Instituto di Astrofisica Spaziale e Fisica Cosmica, Roma, ItalyUNSPECIFIED
Tosi, F.INAF-IASF Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma ItalyUNSPECIFIED
Kührt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Raponi, A.INAF-IASF, ItalyUNSPECIFIED
Formisano, M.INAF-IASF, ItalyUNSPECIFIED
De Sanctis, M.C.Istituto Nazionale di Astrofisica, Rome, Italy.UNSPECIFIED
Capaccioni, F.INAF-IASF, italyUNSPECIFIED
Filacchione, G.INAF-IASF, Rome, ItalyUNSPECIFIED
Palomba, E.Institute for Interplanetary Space Physics - INAF, Rome, ItalyUNSPECIFIED
Longobardo, AINAF-LAPS, Via del Fosso del Cavaliere 100, I-00133 Rome, ItalyUNSPECIFIED
Ciarnello, M.INAF-IASF, ItalyUNSPECIFIED
Bockelee-Morvan, D.Observatoire de Paris, MeudonUNSPECIFIED
Erard, S.LESIAUNSPECIFIED
Leyrat, C.LESIAUNSPECIFIED
Drossart, P.Observatoire de Paris, Meudon, FranceUNSPECIFIED
Arnold, GabrieleGabriele.Arnold (at) dlr.deUNSPECIFIED
Date:18 December 2014
Journal or Publication Title:Eos Trans. AGU, Fall Meet. Suppl.
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:P41C-3951-P41C-3951
Status:Published
Keywords:VIRTIS, Rosetta, 67P, temperature
Event Title:AGU Fall meeting
Event Location:San Francisco, California (USA)
Event Type:international Conference
Event Dates:15 Dec - 19 Dec 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Institute of Planetary Research > Asteroids and Comets
Deposited By: Kappel, David
Deposited On:05 Jan 2016 13:02
Last Modified:23 May 2016 22:55

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