O'Brien Observatory

The O'Brien Observatory (OBO) is an astronomical observatory in the city of Marine on St. Croix, Minnesota, United States, about 35 kilometers (22 miles) northeast of Minneapolis. The observatory is owned and operated by the University of Minnesota and opened in 1968. It has one telescope, a 0.76-meter (30 in) Cassegrain reflector capable of observing at both optical and infrared wavelengths.^[1] It is used for primarily for instruction and instrument testing, and occasionally for research purposes.^[2]

O'Brien Observatory

Organization	University of Minnesota
Location	Marine on St. Croix, Minnesota
Coordinates	45.1815°N 92.7757°W / 45.1815; -92.7757
Altitude	308 meters (1,010 ft)
Established	1968 (1968)
Website	O'Brien Observatory
Telescopes
unnamed telescope 0.76 m reflector
Location of O'Brien Observatory

See also

• Mount Lemmon Observatory
• List of astronomical observatories