Between the years 1999 and 2001 we conducted an intensive campaign to find a proper location for the observatory. These included ski resorts in the Santiago outskirts and some small hills. Finally, we found the perfect location at the Hacienda Santa Martina, where we were welcomed.
We finished the construction in 2004 and we have been operating since January 2005.
The observatory has increased the number of telescopes to 4 and now it also hosts the SLOOH project.