Max Valier Sat
Italy
Max Valier was a 15 kg (33 lb) X-ray telescopic satellite which was built in collaboration with the Technologische Fachoberschule "Max Valier" in Bozen, the Technologische Fachoberschule "Oskar von Miller" in Meran and the Amateurastronomen "Max Valier". The Max Planck Institute for Astrophysics provided the small X-ray telescope Rosi, which allowed amateur astronomers to observe the sky in X-ray wavelength for the first time. It was launched with the help of the OHB in Germany by an Indian PSLV-C38 rocket on June 23, 2017. It re-entered the Earth's atmosphere on June 30, 2024 after remaining operative for 7 years and 7 days.
Observatory data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).