The Pistoia Mountains Astronomical Observatory (; obs. code: 104), also known as the San Marcello Observatory and the Pian dei Termini Observatory (), is an astronomical observatory in San Marcello Piteglio, Tuscany, central Italy. The observatory uses a 0.4- and 0.6-meter Newton-Cassegrain telescope and is the home of the Gruppo Astrofili Montagna Pistoiese, a group of amateur astronomers known for its members Luciano Tesi (founder), Silvano Casulli, Paolo Bacci, Vasco Cecchini and late Vittorio Goretti. List of discovered minor planets See also List of asteroid-discovering observatories List of astronomical observatories References External links Gruppo Astrofili Montagna Pistoiese A review of the observatory An old page about the observatory Astronomical observatories in Italy Buildings and structures in Tuscany Minor-planet discovering observatories San Marcello Piteglio