Determining the Rotational Period of an Asteroid Using Differential Lightcurve Photometry

The purpose of this project is to explore experimental methods of finding the rotational period of an asteroid. Using the West Point observatory, we collected experimental data on the light intensity of 4482 Frerebasil, an asteroid of unknown period with an absolute magnitude of 13.1. We differentially compared the light intensity of the asteroid with background stars to plot the relative brightness of Frerebasil over time. This research expands upon the capabilities of the West Point observatory, adding automation software and instrumentation to facilitate 8 hour imaging sessions. We expect this research to be useful in identifying which asteroids are well suited for robotic exploration and mineral harvesting.