IOTA-ES, the European Section of the International Occultation Timing Association, is a prominent community dedicated to the study of occultation astronomy, active for over 40 years. This scientific non-profit organization facilitates research and observational techniques relating to a variety of celestial events, including stellar occultations by the Moon, asteroids, comets, planets, and their moons, significantly enhancing our understanding of the Solar System's structure and atmospheres.

IOTA-ES organizes the European Symposium on Occultation Projects (ESOP) annually, where amateur and professional astronomers converge to share insights and discuss recent findings. The Journal for Occultation Astronomy (JOA), published quarterly, further disseminates knowledge across the globe. Members benefit from access to the Stellar Occultation Data Input System (SODIS), workshops, and equipment loans. Open to enthusiasts and experts alike, IOTA-ES fosters collaboration among over 100 members across Europe and Northern Africa, providing a platform for both learning and active research in this fascinating field of astronomy.