Dear Gianni, You are truly wonderful! You have, come sempre, solved the problem!
We have all these people on the English list wondering about PL and we have to wait for you to interpret our English! I didn't think of the Geocentric Latitude and I certainly didn't think of the Reduced Polar Latitude but your calculations point to that conclusion. Your figure of f = 1/298.257 is used by Meeus but would not have been known in 1845. I agree that 1/280 is the value most likely used. You win the prize for solving this puzzle! Very best wishes Frank --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
