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Emissivity and reflectance measurements for a suite of asteroid analogues in the 1 to 100 µm spectral range

Maturilli, Alessandro and Helbert, Jörn (2013) Emissivity and reflectance measurements for a suite of asteroid analogues in the 1 to 100 µm spectral range. Astrobiological and cosmochemical implications of Marco Polo-R sampling of a primitive asteroid, 16.-17. Jan. 2013, Barcelona, Spanien.

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Abstract

We have measured the emissivity and reflectance spectra for a suite of analogues of relevance for asteroid studies. The suite consists of ten samples - 3 meteorites and 7 synthetic or terrestrial analogue materials. Meteorite Allende represents the CV group of the Carbonaceous Chondrites meteorites; Murchison meteorite is representing the CM group, while the meteorite Millbillillie represents achondritic eucrites. Synthetic and terrestrial enstatite, synthetic L-Chondrite and H-Chondrite, graphite and two phyllosilicates (montmorillonite and serpentine) complete the set of analogues. In the Planetary Emissivity Laboratory (PEL) at the Institute for Planetary Research of the German Aerospace Center (DLR) in Berlin, we can measure bi-directional reflectance of samples in the whole 1 to 100 µm spectral range, by using an evacuated (10-4 bar) Bruker Vertex 80V FTIR spectrometer and a Bruker A513 reflection unit, allowing phase angles between 26° and 170°. The same instrument, coupled with an external emissivity chamber, can be used to measure emissivity of samples under the same vacuum and in the same wide spectral range, for sample temperatures from low (50° C) to very high (above 500° C). Complementary purged Bruker IFS88 FTIR spectrometer equipped with a Harrick SeagullTM bi-conical reflection unit permits to cover the 0.4 to 1.1 µm spectral range. For this study, when possible we measured the smaller available grain size separate (0-25 µm) and for emissivity measurements we kept the sample temperature to the minimum we could get. Our results can be important in support for future (sample return) missions to asteroids (i.e. Hayabusa II, MarcoPolo-R and OSIRIS-REx) as well as for the interpretation of ground based observations of asteroids and minor bodies.

Item URL in elib:https://elib.dlr.de/87107/
Document Type:Conference or Workshop Item (Speech)
Title:Emissivity and reflectance measurements for a suite of asteroid analogues in the 1 to 100 µm spectral range
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Maturilli, AlessandroAlessandro.Maturilli (at) dlr.deUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Date:16 January 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:emissivity, reflectance, asteroids
Event Title:Astrobiological and cosmochemical implications of Marco Polo-R sampling of a primitive asteroid
Event Location:Barcelona, Spanien
Event Type:international Conference
Event Dates:16.-17. Jan. 2013
Organizer:IEC
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 - Vorhaben BepiColombo (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Deposited By: Maturilli, Alessandro
Deposited On:06 Jan 2014 08:06
Last Modified:01 Dec 2018 19:50

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