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CAMS: Cameras for Allsky Meteor Surveillance to establish minor meteor showers
Authors:P Jenniskens  PS Gural  L Dynneson  BJ Grigsby  KE Newman  M Borden  M Koop  D Holman
Institution:aSETI Institute, Carl Sagan Center, 189 Bernardo Avenue, Mountain View, CA 94043, USA;bScience Applications International Corp., Advanced Research Division, 14668 Lee Road, Suite 6032, Chantilly, VA 20151, USA;cFremont Peak Observatory Association, P.O. Box 1376, San Juan Bautista, CA 95045, USA;dLick Observatory, U.C. Santa Cruz, 7281 Mount Hamilton Road, CA 95140, USA;eThe University of Arizona, College of Optical Sciences and Engineering, 1630 East University Boulevard, Tucson, AZ 85721, USA
Abstract:First results are presented from a newly developed meteoroid orbit survey, called CAMS – Cameras for Allsky Meteor Surveillance, which combines meteor detection algorithms for low-light video observations with traditional video surveillance tools. Sixty video cameras at three stations monitor the sky above 31° elevation. Goal of CAMS is to verify meteor showers in search of their parent comets among newly discovered near-Earth objects.This paper outlines the concept of operations, the hardware, and software methods used during operation and in the data reduction pipeline, and accompanies the data release of the first batch of meteoroid orbits. During the month of November 2010, 2169 precisely reduced meteoroid trajectories from 17 nights have an error in the apparent radiant of the trajectory <2° and error in speed <10%. Median values of the error are 0.31° and 0.53 km/s, respectively, sufficient to resolve the intrinsic dispersion of annual meteor showers and resolve minor showers from the sporadic background. The limiting visual magnitude of the cameras is +5.4, recording meteors of +4 magnitude and brighter, bright enough to stand out from the mostly fainter sporadic meteors detected as under dense radar echoes.CAMS readily detected all established showers (6) active during the clear nights in November. Of the showers that needed confirmation, we confirm the theta Aurigids (THA, IAU#390), the chi Taurids (CTA, IAU#388), and the omicron Eridanids (OER, IAU#338). We conclude that the iota November Aurigids (IAR, IAU#248) are in fact the combined activity of the theta Aurigids and chi Taurids, and this shower should be dismissed from the list. Finally, there is also a clustering consistent with the zeta Cancrids (ZCN, IAU#243), but we cannot exclude that this is lower perihelion dust belonging to the Orionid shower.Data are submitted to the IAU Meteor Data Center on a semi-regular basis, and can be accessed also at http://cams.seti.org.
Keywords:Meteor showers  Orbit determination  Comets  Asteroids
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