f68r: eclipse from 1419?

[mgvtheus]

1. Indeed Uranus, but mistaken for a regular star, given that it was only identified as a planet during the 18th century; or

It is practically impossible. Uranus is a very faint object in the sky. It's visible to the naked eye if you have dark skies and perfect vision, but it is totally unremarkable compared to more luminous stars, this is why it was not identified before the late 18th century. There are thousands of celestial objects that appear brighter than Uranus and there will be tens of brighter objects located at approximately the same position in the sky, with absolutely no reason to single out Uranus among them. So, it's extremely unlikely that a 15 century MS references Uranus as a celestial object in any way, and even if they did, obviously they would have to invent a name for it, since it wasn't known as Uranus back then.

First of all, thank you! 

I agree with your analysis, indeed my identification of Uranus is quite absurd for the time, so it's most likely to be another star of the tens of possibilities we might have.

I'll keep on researching.