Mount Lemmon Observatory

History

Telescopes

• The Steward Observatory Telescope is a Cassegrain reflector used for the Mount Lemmon Survey, which is part of the Catalina Sky Survey. It was built in the late 1960s and first installed at Catalina Station on Mount Bigelow, which is nearby in the Santa Catalina Mountains. It was moved to Mt. Lemmon in 1972, and then re-housed in its current location in 1975. Its original metal primary mirror performed poorly and was replaced in 1977 with a glass mirror made of Cer-Vit. It is one of the telescopes used by students at Astronomy Camp. It discovered 2011 AG5, an asteroid which achieved 1 on the Torino Scale.
• The UMN-MLOF telescope began operating in 1970. It is a Dall-Kirkham optical/near infrared and is of the same general design as the 1.5 m Steward telescope and another at San Pedro Mártir. The original metal mirror performed poorly and was replaced with a Cer-Vit mirror in 1974. The University of California, San Diego was originally a partner of UMN in operating the telescope.
• The CSS reflecting telescope is an unusual Pressman-Camichel design and is used to provide automated follow up observations of newly discovered near-Earth objects. It was originally located at Catalina Station and was moved to MLO in 1975. It was refurbished in 2008 and placed in a new dome in 2009 before being integrated into CSS operations.
• The KASI robotic telescope was installed in 2003 and is the only instrument of the Mt. Lemmon Optical Astronomy Observatory operated by the Korea Astronomy and Space Science Institute.

• The Schulman Telescope is a Ritchey-Chrétien reflector built by RC Optical Systems and installed in September 2010. It is operated by the Mount Lemmon SkyCenter and is Arizona's Largest dedicated public observatory. The Schulman Telescope was designed from inception for remote control over the internet by amateur and professional astrophotographers worldwide, and is currently the world's largest telescope dedicated for this purpose.
• A reflecting telescope installed in 1963 at Catalina Station was moved to MLO in 1972.
• A Ritchey-Chrétien reflector was built by RC Optical Systems and is operated by the Mount Lemmon SkyCenter.
• The John Jamieson Telescope was donated to UA in 1999 and dedicated in 2005. It is optimized for near infrared observing and is operated by the Mount Lemmon SkyCenter.