[1][2] 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.
[2] Currently, the OCA offers a dark-sky site to viewers, which includes a 22-inch Schmidt-Cassegrain telescope and public-use observation areas.
[4] This telescope is operated at the OCA Observatory, located at a dark-sky site that is a two hour drive from Orange County.
[5] 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.
The library is located at the Irvine Lecture Hall of the Chapman University and is operational during the general meetings.