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Metallic Asteroids in the IRAS Minor Planet Survey - a NEOShield Study

Drube, Line und Harris, Alan W. (2014) Metallic Asteroids in the IRAS Minor Planet Survey - a NEOShield Study. Asteroids, Comets, and Meteors, 2014-06-30 - 2014-07-04, Helsinki, Finland.

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Kurzfassung

Studies of the compositions of asteroids, especially their metal content, are relevant not only to investigations of their nature, but also to estimations of their potential to wreak devastation on impacting the Earth. In this respect it is informative to compare the airburst of a stony object, such as the Tunguska event, which destroyed a forest but left no crater, with the impact of a similarly sized metallic object, which produced the 1.2 km diameter Barringer Crater in Arizona. In view of the evident link between metal content and the near-Earth asteroid thermal model (NEATM; Harris 1998) fitting parameter, eta, which carries information on thermal inertia (Harris and Drube, 2014; see abstract submitted to this conference), we are carrying out a re-analysis of Infrared Astronomical Satellite (IRAS) data (Tedesco et al., 2002) with NEATM to further explore the dependence of eta and thermal inertia on metal content. In addition to calculating best-fit values of eta, we are calculating the angle between the spin vector and the solar direction, theta, for all IRAS sightings of each asteroid for which a spin vector is available. The eta values of objects with high thermal inertia and moderate to high spin rates should depend strongly on theta, whereas those with low thermal inertia and/or low spin rates should not. By studying the relationships between theta and eta, we aim to further explore the potential of the results of Harris and Drube (2014) and provide insight into relationships between asteroid thermal properties, taxonomic type, albedo, spin rate, etc. We will present the first results of our work and provide a demonstration of its potential. The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 282703 (NEOShield Project). Harris, A. W., 1998, Icarus, 131, 291. Harris, A. W. and Drube, L, 2014, Ap. J. Letters, 785, L4 Tedesco, E. F. et al, 2002, Astron. J., 123, 1056.

elib-URL des Eintrags:https://elib.dlr.de/89973/
Dokumentart:Konferenzbeitrag (Vortrag)
Zusätzliche Informationen:NEOShield Project
Titel:Metallic Asteroids in the IRAS Minor Planet Survey - a NEOShield Study
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Drube, LineLine.Drube (at) dlr.dehttps://orcid.org/0000-0003-2486-8894NICHT SPEZIFIZIERT
Harris, Alan W.alan.harris (at) dlr.dehttps://orcid.org/0000-0001-8548-8268NICHT SPEZIFIZIERT
Datum:Juli 2014
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:asteroids, metal, metallic asteroids, M-types, NEOShield
Veranstaltungstitel:Asteroids, Comets, and Meteors
Veranstaltungsort:Helsinki, Finland
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:30 Juni 2014
Veranstaltungsende:4 Juli 2014
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erforschung des Weltraums
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):R - Exploration des Sonnensystems
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Leitungsbereich PF
Hinterlegt von: Drube, Line
Hinterlegt am:15 Aug 2014 13:05
Letzte Änderung:24 Apr 2024 19:55

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