The Orange County Astronomers (OCA) is a 501(c)(3) non-profit, civilian-led astronomy organization in Orange County, southern California. It was formed in 1967 and currently operates with around 800 concurrent members; they offer beginner courses in astronomy, and have meetings on the second Friday of every month at Chapman University.
OCA Observatory
In September of 1984, a 22-inch Schmidt-Cassegrain telescope along with an observatory were opened in the namesake of William Kuhn. This telescope is operated at the OCA Observatory, located at a dark-sky site that is a two hour drive from Orange County. The site includes a mobile home outfitted with a kitchen and bathroom, and is used as a location to warm up in the winter, or cool off in the summer.
Library
Members can check out a wealth of books and videos available at the club's library. The library is located at the Irvine Lecture Hall of the Chapman University and is operational during the general meetings.
Asteroid
Asteroid 6525 Ocastron, discovered by Jack B. Child and Greg Fisch in 1992, was named in recognition and appreciation of the Orange County Astronomers.