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A Strategy for Exploring the Asteroid Belt with Ion Propulsion: Status of the Dawn Mission

Russell, C.T. und Capaccioni, F. und Christensen, U. und Coradini, A. und DeSanctis, M.C. und Feldman, W.C. und Jaumann, Ralf und Keller, H.U. und Konopliv, A.S. und McCord, T.B. und McFadden, L.A. und McSween, H.Y. und Mottola, S. und Neukum, G. und Pieters, C.M. und Prettyman, T.H. und Raymond, C.A. und Smith, D.E. und Sykes, M.V. und Williams, B.G. und Zuber, M.T. (1996) A Strategy for Exploring the Asteroid Belt with Ion Propulsion: Status of the Dawn Mission. In: Geophysical Research Abstracts, 8. EGU. EGU General Assembly 2006, 2006-04-02 - 2006-04-07, Vienna, Austria. ISSN 1607-7962

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Offizielle URL: http://www.cosis.net/abstracts/EGU06/05272/EGU06-J-05272.pdf

Kurzfassung

The largest asteroids are survivors from the earliest days of the formation of the solar system and by and large have escaped the heavy bombardment period largely unscathed. Moreover, these largest bodies should have remained closest to their points of origin. Thus a strategy of visiting the largest bodies in the main belt could tell us much about the original compositional gradient in the solar system and hence the temperature and pressure gradient that produced it. The Dawn mission explores the two most massive main belt asteroids 4 Vesta and 1 Ceres at 2.34 and 2.77 AU respectively. These bodies are very different. Vesta has an equatorial diameter of about 520 km and is covered with basaltic flows whereas Ceres is close to 1000 km in diameter and has a shape and density consistent with a rocky core covered by a thick ice (˜100 km) shell. The third most massive main belt asteroid, 2 Pallas, lies at the same distance as Ceres with the same size of Vesta but a much lower density. However, since it orbits at a high inclination it is quite inaccessible. The fourth most massive asteroid is 10 Hygiea at 3.12 AU. Much less is known about Hygiea than the other three asteroids but it is sufficiently further out that we might expect as much a difference between Hygiea and Ceres as we see between Ceres and Vesta, perhaps indicating how organic molecules were radially distributed. Another significant body in this region is 16 Psyche that appears to be the iron core of a much larger original body. This too would make an attractive target for an asteroid mission. In fact it is possible using the latest advances in ion engines to design a mission like Dawn that could visit both these bodies.

Dokumentart:Konferenzbeitrag (Poster)
Titel:A Strategy for Exploring the Asteroid Belt with Ion Propulsion: Status of the Dawn Mission
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Russell, C.T.UCLA
Capaccioni, F.IFSI
Christensen, U.MPS
Coradini, A.IFSI
DeSanctis, M.C.IAFS
Feldman, W.C.LANL
Jaumann, RalfNICHT SPEZIFIZIERT
Keller, H.U.MPS
Konopliv, A.S.JPL
McCord, T.B.UoH
McFadden, L.A.UoM
McSween, H.Y.UoT
Mottola, S.NICHT SPEZIFIZIERT
Neukum, G.FU Berlin
Pieters, C.M.Brown Univ.
Prettyman, T.H.LANL
Raymond, C.A.JPL
Smith, D.E.GSFC
Sykes, M.V.UoA
Williams, B.G.JPL
Zuber, M.T.MIT
Datum:April 1996
Erschienen in:Geophysical Research Abstracts
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:8
Verlag:EGU
ISSN:1607-7962
Status:veröffentlicht
Stichwörter:Dawn Mission, Ceres, Vesta
Veranstaltungstitel:EGU General Assembly 2006
Veranstaltungsort:Vienna, Austria
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-04-02 - 2006-04-07
Veranstalter :European Geoscience Union
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Projekt DAWN (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Asteroiden und Kometen
Institut für Planetenforschung
Institut für Planetenforschung > Planetengeologie
Hinterlegt von: Dr.phys. Stefano Mottola
Hinterlegt am:23 Jul 2007
Letzte Änderung:27 Apr 2009 14:05

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