Rothney Astrophysical Observatory
Coordinates: 50 ° 52 ′ 21.5 " N , 114 ° 17 ′ 37.1" W.
The Rothney Astrophysical Observatory is an observatory of the University of Calgary , about 20 km southwest of Calgary in Canada .
Among other things, it has a 1.8 m reflecting telescope , which, along with the David Dunlap Observatory and the Plaskett telescope in the Dominion Astrophysical Observatory, is one of the largest telescopes in Canada. The observatory has a Baker-Nunn camera with which large areas of the sky can be observed.