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Ganymede Occulting a Magnitude 7 Star - A Call for a European Campaign
JOA 2025, Vol. 15, No. 3, Page 3 Author(s): Thierry Midavaine et al.Abstract: An exceptional event is scheduled on 2025 October 14. Jupiter’s satellite Ganymede III will occult a magnitude 7.5 star for observers in western Europe, causing a small drop in brightness of 0.1 magnitudes for up to 17 minutes. This occultation is motivating a campaign to achieve three ambitions. This paper shares all the data to allow you to join this “2025 Ganymede Campaign”. Amateur and professional collaborations on stellar occultations by solar system bodies is a very active field in astronomy. Some of these events are important to motivate a wide mobilisation of the amateur community. Here, Ganymede, the star itself and the network of amateurs are the three targets of this campaign. This event seems obvious and a nice opportunity for a beginner to join the community, in fact this event is elusive to catch visually using a telescope. It requires a video recording to get the event from the processing and to deliver useful data.