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AsteroidFinder - The Space-Borne Telescope to Search for NEO Asteroids

Hartl, Michael und Mosebach, Herbert und Schubert, Josef und Michaelis, Harald und Mottola, Stefano und Kührt, Ekkehard und Schindler, Karsten (2010) AsteroidFinder - The Space-Borne Telescope to Search for NEO Asteroids. International Conference on Space Optics (ICSO 2010), 4th - 8th October 2010, Rhodes Island, Greece.

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Kurzfassung

This paper presents the mission profile as well as the optical configuration of the space-borne AsteroidFinder telescope. Its main objective is to retrieve asteroids with orbits interior to Earth’s orbit. The instrument requires high sensitivity to detect asteroids with a limiting magnitude of equal or larger than 18.5mag (V-Band) and astrometric accuracy of 1arcsec (1σ). This requires a telescope aperture greater than 400cm², high image stability, detectors with high quantum efficiency (peak > 90%) and very low noise, which is only limited by zodiacal background. The telescope will observe the sky between 30° and 60° in solar elongation. The telescope optics is based on a Cook type TMA. An effective 2°×2° field of view (FOV) is achieved by a fast F/3.4 telescope with near diffraction-limited performance. The absence of center obscuration or spiders in combination with an accessible intermediate field plane and exit pupil allow for efficient stray light mitigation. Design drivers for the telescope are the required point spread function (PSF) values, an extremely efficient stray light suppression (due to the magnitude requirement mentioned above), the detector performance, and the overall optical and mechanical stability for all orientations of the satellite. To accommodate the passive thermal stabilization scheme and the necessary structural stability, the materials selection for the telescope main structure and the mirrors are of vital importance. A focal plane with four EMCCD detectors is envisaged. The EMCCD technology features shorter integration times, which is in favor regarding the pointing performance of the satellite. The launch of the mission is foreseen for the year 2013 with a subsequent mission lifetime of at least 1 year.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:AsteroidFinder - The Space-Borne Telescope to Search for NEO Asteroids
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hartl, MichaelKayser-Threde, Munich
Mosebach, HerbertKayser-Threde, Munich
Schubert, JosefKayser-Threde, Munich
Michaelis, Haraldharald.michaelis@dlr.de
Mottola, Stefanostefano.mottola@dlr.de
Kührt, Ekkehardekkehard.kuehrt@dlr.de
Schindler, Karstenkarsten.schindler@dlr.de
Datum:2010
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:asteroid, IEO, Cesic, SSB, telescope, AsteroidFinder, AsteroidFinder/SSB
Veranstaltungstitel:International Conference on Space Optics (ICSO 2010)
Veranstaltungsort:Rhodes Island, Greece
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:4th - 8th October 2010
Veranstalter :ESA
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 AsteroidenFinder - Instrumente (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetare Sensorsysteme
Hinterlegt von: Karsten Schindler
Hinterlegt am:15 Okt 2010 11:23
Letzte Änderung:15 Okt 2010 11:23

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