Ephemerides is the plural for ephemeris which refers to a table giving the coordinates of a celestial body at a number of specific times during a given period. It can also refer to an annual publication giving the positions of the sun, moon and planets during the course of the year.
1 Additional Answer
Ask.com Answer for:
what is the definition of ephemerides
NOUN [PLURAL E·PHE·MER·I·DES]
a table showing the positions of a heavenly body on a number of dates in a regular sequence.