AsteroidFinder - The Space-Borne Telescope to Search for NEO Asteroids
Hartl, Michael and Mosebach, Herbert and Schubert, Josef and Michaelis, Harald and Mottola, Stefano and Kührt, Ekkehard and 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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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.
|Document Type:||Conference or Workshop Item (Speech, Paper)|
|Title:||AsteroidFinder - The Space-Borne Telescope to Search for NEO Asteroids|
|In ISI Web of Science:||No|
|Keywords:||asteroid, IEO, Cesic, SSB, telescope, AsteroidFinder, AsteroidFinder/SSB|
|Event Title:||International Conference on Space Optics (ICSO 2010)|
|Event Location:||Rhodes Island, Greece|
|Event Type:||international Conference|
|Event Dates:||4th - 8th October 2010|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Projekt AsteroidenFinder - Instrumente (old)|
|Institutes and Institutions:||Institute of Planetary Research > Planetary Sensor Systems|
|Deposited By:||Karsten Schindler|
|Deposited On:||15 Oct 2010 11:23|
|Last Modified:||15 Oct 2010 11:23|
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