The Osservatorio Astronomico Ancona, also known as the Paolo Senigalliesi Astronomical Observatory, is operated by the Associazione Marchigiana Astrofili APS, an amateur astronomy association based in Ancona, Italy. Located in the Pietralacroce area, the observatory welcomes visitors to explore the universe through guided activities and public events. Its facilities include telescopes of different sizes for observing planets, nebulae and galaxies, as well as a dedicated astrophotography section with periodic meetings and equipment for deep-sky photography.

The association also offers tailored educational visits and learning pathways for students of all ages, alongside a scientific section focused on research and monitoring with expert guidance. Public observing sessions are held on the first Friday of each month, while other visits are available by reservation; events may depend on weather conditions. People can join as members to access activities such as regular evening sessions, astronomy photography, and support with telescopes and equipment.

Annual membership options include ordinary and supporter plans. The observatory is at Via del Conero 16/A, Ancona