Solar transit of ISS in front of sunspots, June 12 2025
Using real time images of the Sun, I calculated the position of the main sunspot groups towards vertical and horizontal directions (which depends on time and location), I compared it to the trajectory planned by www.transit-finder.com, and placed myself on the corresponding transit line (which was not the center of the transit visibility path).
All the individual images are single shots at 1/32000 s. I never make ISS transits with stackings or assemblies.
Instrument: CFF200 triplet apo refractor, Baader Herschel wedge, Olympus OM-1, Emmanuel Rietsch's GPS trigger.
