(285263) 1998 QE2 is a Potentially Hazardous Amor asteroid discovered by LINEAR at Socorro in 1998. A total of 515 data points were obtained over seven nights during the period 2013 May 2-10 including solar phase angles between +67.4° to +70.8°.The average magnitude was 16.1 and average SNR was 110.
Hills Observatory: 1 January 2013 to 19 January 2019
MPO Canopus suggests a number of possible lightcurve periods including 4.3, 4.7, 5.3 and 5.9 h. Subsequent analysis of radar data obtained at Goldstone and Arecibo shows that 1998 QE2 is a binary system. The primary has a rotation period of the order of 4.7h and the satellite of the order of 32h (http://echo.jpl.nasa.gov/asteroids/1998QE2/1998QE2_planning.html). The lightcurve presented in this paper shows a rotation period of 4.751 h ± 0.001 h, which is consistent with the radar data, and amplitude of 0.23 ± 0.01 mag suggesting that the asteroid rotated 40 times during the period of observation.These findings were published in the Minor Planet Bulletin, Volume 41, Number 1, 2014January - March.