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$\begingroup$ Yes lunar distances would definitely work! +1. The 15th century predates astronomical telescopes, so the basic problem is that they had only "naked eye" instruments; the second problem is that their knowledge of the movements of the Moon was, well, medieval. I think that in practice you may count of an accuracy of about plus or minus half a degree for land-based observations, provided you handwave a little a move Tycho Brache (the greatest "naked eye" astronomer of all times) about 200 years earlier than in real life to have a chance at producing good lunar tables. $\endgroup$

AlexP
– AlexP

2017-05-10 21:04:49 +00:00
Commented May 10, 2017 at 21:04
1

$\begingroup$ published at Nuremberg in 1514 but the medieval period ended with the Renaissance and Age of Discovery, so that's not medieval technology. $\endgroup$

RonJohn
– RonJohn

2017-05-10 22:19:33 +00:00
Commented May 10, 2017 at 22:19

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