Tracking the Polyrhythm: Broadband Photometry and Lightcurve of the Binary Potentially Hazardous Asteroid (285263) 1998 QE2 with Photometric Analysis Methods

Adrian Lawson Carcione

Abstract


On August 19, 1998, LINEAR at Lincoln Laboratory ETS in New Mexico discovered near-Earth asteroid (285263) 1998 QE2 (MPEC 1998-Q19). The asteroid made its closest approach of the 21st century on May 31, 2013 at a distance of 0.039 AU, and was identified by the Minor Planet Center as being a Potentially Hazardous Asteroid. I observed asteroid 1998 QE2 from Table Mountain Observatory’s (TMO) 0.6-m telescope. I obtained broadband photometric data over a total of four nights from July 16-19, 2013. Long-slit CCD spectrograms of 1998 QE2 were obtained using the Palomar 5-m Hale Telescope on June 05, 2013 (ATel #5132). Both the spectral and photometric data analyses show that that 1998 QE2 is a Ch-type asteroid (Bus taxonomy). The asteroid was also a radar target observed at Goldstone throughout June 2013 by the JPL Radar Team, where it was determined to have a moon. I shall try to correlate our photometric lightcurve of asteroid 1998 QE2 with the known presence of the secondary body, and shall determine the synodic period of 1998 QE2. Our R(1,1,


Keywords


Asteroids, Photometry; Lightcurve

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