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- W85483374 abstract "AbstractWe present recent results of our simulation of the Pan-STARRS prototype survey telescopedetecting very small impactors (meteoroids) close before they enter the atmosphere of the Earth.We analyze the sky-plane apparent motion of these synthetic objects of asteroidal origin. 1 Introduction Since the last two decades the scientiflc and public interest about asteroids hitting the Earth inthe past and recognition of more than 170 impact structures on it’s surface led to developmentof CCD-based asteroid and comet surveys such as Spacewatch, LINEAR, LONEOS, NEAT andcurrent leader in discovering Near Earth Asteroids (NEOs), the Catalina Sky Survey. Thanks tothis efiort we believe to eliminate impact threat by cataloging » 90% of NEOs larger than 1 kmin diameter which impact could pose a global catastrophe in following years. Stokes and Evans(2004) recommended to extend the completion of hazardous objects down to 140 m in diameter toeliminate most of possible local impact events on the Earth in the next 100 years. For this goalcurrent surveys are not able to achieve this result in satisfying time frame and only space basedsurveys or newly proposed Large Synoptic Survey Telescopes (LSST) with all-sky coverage couldsucceed in a decade or two of operation. Apparently such kinds of survey may detect very smallbodies even of a size of meteoroid (meter-size) and would greatly increase the number of known Solarsystem objects. We have performed a simulation of a next generation all-sky survey’s prototype Pan-STARRS 1 (PS1) e–ciency at detecting Earth-impacting asteroids and particularly investigatedhow it would detect the smallest impacting bodies - bolides (bright meteors) even before theyenter the Earth’s atmosphere. The prototype has been built on Haleakala, Maui and with around6000 square degrees survey cadency per night, 1.4 gigapixel composit CCD camera, powerful imageand moving processing pipelines and software analysis packages represent outstanding masterpiece(Chambers et al., 2004). Such topic is highly interesting because the natural space body has neverbeen observed before its entry into the Earth’s atmosphere, causing meteor trail and even fall downon the Earth. Such discovery can predict the impact place in order to notify ground-based observersto detect atmospheric trajectory, compute possible fall area and compare particle orbit (calculatedfrom multiple distant ground-based stations) with the orbits obtained from astrometry before itentered the atmosphere. Most recent event that excited public and professional community was thediscovery of small asteroid 2008 TC3 by Catalina Sky Survey on October 6, 2008. Its relatively highangular motion on the sky and multiple positions obtained during the night of discovery su–cedto calculate orbit that implied collision with the Earth the next day (Steve Chesley, JPL). Theasteroid of about 3 meters in diameter entered the Earth atmosphere on October 7, 2008 over" @default.
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- W85483374 date "2008-01-01" @default.
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- W85483374 title "Possible meteoroid detections with next generation all-sky surveys" @default.
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