World Minor Planet Center

The Cincinnati Observatory, founded by Ormsby MacKnight Mitchel in 1842, is America’s oldest public/professional observatory. The observatory was situated on Mt. Adams, east of the current downtown Cincinnati; the hill was named for former President John Quincy Adams when he laid the observatory’s cornerstone. In 1873 the observatory was relocated to Mt. Lookout when it became a component of the University of Cincinnati (UC). From 1870s until 1930s the stellar proper motion studies reigned as the observatory’s principal activity.