The dataset describes the observation of an occultation by the Jovian moon Kallichore, captured during the night of December 15, 2025, as part of a campaign supporting the JUICE flyby. It contains 22 observation chords—one positive, ten negative, ten overcast, and one technical failure—recorded by a global network of observers at specific geographic coordinates and elevations. Each entry includes the observer's name, location name, and precise coordinates. The shared data, which is peer-reviewed and published in Rizos et al. (2026) in Nature Astronomy, is intended exclusively for scientific use to characterize this kilometre-scale Jovian moon.