NavList:

I would be able to pinpoint the required latitude with great precision, but if the instructions included the proverbial "show your work" clause, it would become obvious that I arrived at the answer by cheating.  The second image Frank posted shows the Vera C. Rubin Observatory, formerly known as the Large Synoptic Survey Telescope, now near completion in northern Chile - unless the U.S. National Science Foundation loses all its funding. Its shape is so distinctive that I should have been able to identify its silhouette in the first posted image. I suppose it would be fair to use the telescope's known latitude as a traditional "answer at the back of the book" to check whether one's calculations are right or wrong.

Best, Rafael C