This answer to Is Starlink 1130 (Darksat) really dimmer? links to the March 16, 2020 paper in arXiv First observations and magnitude measurement of SpaceX's Darksat which finds only a modest decrease in brightness:
Results. The calibration, image processing and analysis of the Darksat Sloan g’ image gives an estimated Sloan g’ magnitude of 7.57±0.04 at a range of 976.50 km. For STARLINK-1113 an estimated Sloan g’ magnitude of 6.69±0.05 at a range of 941.62 km was found. When scaled to a range of 550 km, a reduction of (55 % ± 4.8 %) is seen in the reflected solar flux between Darksat and STARLINK-1113.
The v1 preprint says
...using the longitude(24.1° west) and latitude (69.9°south) of the Ckoirama observatory...
which puts the Ckoirama observatory under about 4500 meters of freezing antarctic water (first image).
If I invert the latitude and longitude assignments it returns to the Atacama desert where it belongs. If I instead type "Ckoirama observatory" in maps.google.com I get a pin on a map near
24.0894 S, 69.9305 W but the satellite image only shows a hole in the ground. (second image)
click images for full size
The sidebar says:
Antofagasta, Chile W369+6Q Yungay, Antofagasta, Chile astro.uantof.cl +56 55 263 xxxx Open now: Open 24 hours
That link leads to http://www.astro.uantof.cl/research/observatorios/ckoirama-observatory/ which is very informative but has no latitude, longitude or altitude information. 5 Awesome Observatories Around The World mentions that Ckoirama is;
the first observatory built by Chilean engineers
and links to Astrotourism in Chile but no specific information.
Question: What are the latitude, longitude and altitude of Ckoirama observatory? Is there a central location where coordinates like these can be looked up?