LSST's NEO Survey Capabilities

Details LSST's NEO Survey Capabilities LSST's NEO Survey Capabilities

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.0808i&link_type=abstract

American Astronomical Society, DPS meeting #39, #8.08; Bulletin of the American Astronomical Society, Vol. 39, p.422

Astronomy and Astrophysics

Astronomy

Scientific paper

The Large Synoptic Survey Telescope (LSST) is currently by
far the most ambitious proposed ground-based optical survey.
The LSST system, with its 8.4m telescope and 3,200 megapixel
camera, will be sited at Cerro Pachon in northern Chile. In
a continuous observing campaign of pairs of 15 second
exposures, LSST will cover the entire available sky every three
nights in two photometric bands to a depth of V=25 per visit
(two exposures), with exquisitely accurate astrometry and
photometry. Over the proposed survey lifetime of 10 years, each
sky location will be visited over 1000 times, with the total
exposure time of 8 hours distributed over six broad photometric
bandpasses.
Solar System mapping is one of the four key scientific design
drivers, with emphasis on efficient Near-Earth Object (NEO) and
Potentially Hazardous Asteroid (PHA) detection, orbit
determination, and object characterization. Detailed modeling
of LSST operations, incorporating real historical weather and
seeing data from Cerro Pachon, shows that LSST using its baseline
design cadence could find 90% of the PHAs with diameters larger
than 250 m, and 75% of those greater than 140 m within ten
years. Furthermore, by optimizing about 15% of the total
observing time for NEO detection, the ongoing simulations suggest
that the LSST system, with its first light in 2014, can reach the
90% completeness level for 140m objects, mandated by the Congress.

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