[1] Initially, there were four ASAS-SN telescopes[clarification needed] at Haleakala and another four at Cerro Tololo, a Las Cumbres Observatory site.
Twelve more telescopes were deployed in 2017 in Chile, South Africa and Texas, with funds from the Gordon and Betty Moore Foundation, the Ohio State University, the Mount Cuba Astronomical Foundation, China, Chile, Denmark, and Germany.
All the telescopes (Nikon telephoto 400mm/F2.8 lenses) have a diameter of 14 cm and ProLine PL230 CCD cameras.
The pixel resolution in the cameras is 7.8 arc seconds, so follow-up observations on other telescopes are usually required to get a more accurate location.
[2] Objects discovered receive designations starting with ASASSN followed by a dash, a two digit year and letters, for example ASASSN-19bt.