ephemeris
/ɪˈfɛmərɪs/
noun
- A table or data set that gives the positions of planets, stars, or other celestial objects at specific times.
- Modern navigation apps use an electronic ephemeris to calculate satellite positions.
- She printed out the monthly ephemeris to plan her stargazing sessions.
- The astronomer consulted an ephemeris to find the exact location of Mars on that date.
Synonyms