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Regolith Properties of Asteroid 21 Lutetia Constrained by Combined Data Sets of the MIRO and VIRTIS Instruments During the Rosetta Spacecraft FlybyDuring the July 10, 2010 flyby of Asteroid 21 Lutetia by the Rosetta spacecraft, maps of surface and subsurface temperatures were derived from the VIRTIS and MIRO instruments respectively. Both data sets indicated a porous surface layer with an extremely low, lunar-like thermal inertia. However, comparisons of the VIRTIS-measured and MIRO-modelled surface temperatures revealed offsets of 10- 30 K, indicative of self-heating or "beaming" effects that were not taken into account in the MIRO thermal modeling. Inclusion of a model of hemispherical craters at all scales 1 cm and larger, covering 50% of the surface, removes most of the offsets in the VIRTIS, MIRO surface temperature determinations.
Document ID
20150006565
Document Type
Conference Paper
External Source(s)
Authors
Keihm, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Tosi, F. (Istituto di Astrofisica e Planetologia Spaziale (INAF-IAPS) Rome, Italy)
Kamp, L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Capaccioni, F. (Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Rome, Italy)
Grassi, D. (Istituto di Astrofisica e Planetologia Spaziale (INAF-IAPS) Rome, Italy)
Gulkis, S. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Coradini, A. (Istituto di Astrofisica e Planetologia Spaziale (INAF-IAPS) Rome, Italy)
Date Acquired
April 23, 2015
Publication Date
October 3, 2011
Subject Category
Lunar and Planetary Science and Exploration
Meeting Information
European Planetary Science Congress (EPSC) Joint Meeting 2011(Nantes)
Distribution Limits
Public
Copyright
Other
Keywords
Rosetta spacecraft
Asteriod 21 Lutetia