Comparison of Opposition and Near Sun NEO Discoveries by the Catalina Sky Survey

Details Comparison of Opposition and Near Sun NEO Discoveries by the Catalina Sky Survey Comparison of Opposition and Near Sun NEO Discoveries by the Catalina Sky Survey

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.5009b&link_type=abstract

American Astronomical Society, DPS meeting #39, #50.09; Bulletin of the American Astronomical Society, Vol. 39, p.513

Astronomy and Astrophysics

Astronomy

Scientific paper

The Catalina Sky Survey has been operating 3 telescopes for the past three years while extending its sky coverage into the far southern hemisphere but also towards lower solar elongations. Several recent studies (Chesley and Spahr 2002, Milani et al. 2005, Bernardi et al. 2005, Boattini PhD thesis 2007) have pointed out the importance of extending NEO searches at regions of the sky closer to the sun, despite the more challenging observing and orbital determination: to speed up the discovery of the largest unknown NEOs, to debias the known population by finding bodies with small aphelia and/or larger eccentricity/inclination and to encourage the discovery of PHAs in the so-called "sweet spots". In this work we compare orbital characteristics, size distributions, sky-plane densities, of NEOs discovered at different solar elongations (ecliptic longitude and latitude) by the CSS facilities between October 2004 and September 2007: in particular we focus on what has been found in the opposition region respect to areas closer ot the sun. Results from our sample ( 400 Amors, 500 Apollos and 100 Atens) will be analyzed and discussed in view also of refining observing strategies of future NEO surveys.
This work is supported by the NASA NEOO program.

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