ephemeris

noun3

1. •
   A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination.
2. •
   Computer software that calculates the apparent position of celestial bodies.
3. •
   (no longer used) A journal or diary.

   • Wee heard the King was solacing at the Caspian Sea, whither now wee are travelling. Till then let us keepe an Ephemerides or day-journey. — 1638