Winer Observatory, near Sonoita, Arizona, is a private non-profit astronomical observatory operated by Mark and Pat Trueblood since 1983. It became known as a center for small telescopes and robotic observing programs, hosting instruments such as the Iowa Robotic Observatory, Michael Schwartz's supernova survey telescope, and the Kilodegree Extremely Little Telescope, which discovered more than 30 exoplanets. The observatory now houses the Iowa telescope, a telescope owned by a university in Poland, and the Sutter Survey telescope owned by the asteroid mining company TransAstra.