The paragraph notes previously that Mimas is not in hydrostatic equilibrium for its current rotation. A quick search for the moon and hydrostatic equilibrium turned up M. Burša (1984) "Secular Love Numbers and Hydrostatic Equilibrium of Planets". According to this paper the Moon, Mercury and Venus are all far from hydrostatic equilibrium. The discrepancy is ...
It is not easy.
Knowing the time means (roughly) knowing the position of the sun. If you are in the Northern Hemisphere, then the sun is (roughly) South at midday, East at 6am, West at 6pm and so on.
The moon orbits the Earth, so the angle between the sun and the moon is always changing. It may be possible so reason as "The moon is at first quarter, so the ...
I cant help you with skyfield, but i usually use JPL Horizons Web interface. No installation required, you can also print it in a text file if you want:
Otherwise i found the documentation for skyfield:
And if nothing of that works, i made a little astropy script for you