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

References

1. "UMN Infrared Astronomy". University of Minnesota Department of Astronomy. Archived from the original on 2012-02-10. Retrieved 2012-01-10.
2. Mason, C. G.; Gehrz, R. D.; Jones, T. J.; Woodward, C E.; Hanner, M. S.; Williams, D. M. (1 March 2001). "Observations of Unusually Small Dust Grains in the Coma of Comet Hale-Bopp C/1995 O1". The Astrophysical Journal. 549 (1): 635–646. Bibcode:2001ApJ...549..635M. doi:10.1086/319039.

External links

• Department of Astronomy Infrared Laboratory at the University of Minnesota
• Lee & Rose Warner Nature Center Clear Sky Chart Forecasts of observing conditions approximately 4.5 km west of OBO.