Amateur astronomers can measure distant asteroids by observing occultations—when asteroids block starlight—using modest equipment like a 5-inch telescope, affordable camera, and GPS-synchronized flasher for timing calibration. Unlike professionals with large telescopes, amateurs can position themselves in the asteroid's shadow path to collectively map its shape and reveal details about the asteroid.
Technical documentation for the Astrophyzix Digital Observatory's Daily Close Approach Report, which tracks Near-Earth Objects and Potentially Hazardous Asteroids. The document outlines methods, governance, and data provenance to ensure transparency and reproducibility in planetary defense reporting.