Abstract
In response to a call for photometric observations of the Jupiter Trojan binary asteroid, 617 Patroclus-Menoetius, we formed a collaboration of observers in the United States, Italy, Brazil, and Australia. The observations were to coincide with the 2024-2025 mutual events season, which would allow refining the parameters of the system in preparation for NASA’s Lucy fly-by mission in 2033 March. We recorded parts of nine different events from 2024 September 12 through October 23. Analysis found a period of 102.873 ± 0.006 h for the pair when including the events. The period without events was found to be 103.09 ± 0.04 h with an amplitude of 0.12 ± 0.01 mag. While we present analysis of our data for period and event details, we offer no interpretation regarding the parameters of the system beyond the rotation/orbital period. Additional observations will continue for as long as possible.