Principia Astronomical Observatory
ObservatoryThe Principia Astronomical Observatory is an observatory located on the campus of Principia College, in Elsah, Illinois, United States. The observatory was installed on June 18, 1998. It features a 16 inch mirror and is of a Ritchey-Chretien design. The objective focal length of the telescope is 4000 mm. The control software is by the Telescope Control System written by Dave Harvey of Comsoft Software. The mirror was ground and certified by Don Loomis, former chief optician at Kitt Peak National Laboratories. The telescope was manufactured by Optomechanics Research.
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Elsah, Illinois
Village in Illinois, United States
Portage Des Sioux, Missouri
City in Missouri, United States
Principia College
Private liberal arts college in Elsah, Illinois, U.S.
Chautauqua, Illinois
Private semi-gated summer resort in Elsah Township, Illinois
Elsah Township, Jersey County, Illinois
Township in Illinois, United States
Principia College Historic District
Historic district in Illinois, United States
Beltrees, Illinois
Unincorporated in Illinois, United States
Elsah Historic District
Historic district in Illinois, United States