O'Brien Observatory

O'Brien Observatory
OrganizationUniversity of Minnesota
LocationMarine on St. Croix, Minnesota
Coordinates45°10′53″N 92°46′33″W / 45.1815°N 92.7757°W / 45.1815; -92.7757
Altitude308 meters (1,010 ft)
Established1968 (1968)
WebsiteO'Brien Observatory
Telescopes
unnamed telescope0.76 m reflector
O'Brien Observatory is located in the United States
O'Brien Observatory
Location of O'Brien Observatory
[edit on Wikidata]

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]

  1. ^ Cite error: The named reference UNM-OBO was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference 2001MASN was invoked but never defined (see the help page).