Let’s begin with the definition of the word Ephemeris:
Ephemeris is a table or data file giving the calculated positions of a celestial object at regular intervals throughout a period or basically a diary of celestial objects positions.
In 1474, the Ephemerides book was published by the Regiomontanus, Johann Muller, a German astronomer, living in Nuremberg, Germany. The book contained various tables of the daily positions of the celestial bodies and with intended usage by navigators and astronomers.
- Ephemerides | work by Regiomontanus | Britannica.com
…of the heavenly bodies was Ephemerides, compiled by the German astronomer Regiomontanus and published by him in Nürnberg in 1474. This work also set forth the principle of determining longitude by the method of lunar distances—that is, the angular displacement of the Moon from other celestial objects.
- Regiomontanus | Encyclopedia.com
Among other works they published the Ephemerides for the years 1474–1506, calculated by Regiomontanus, and Georg von Purbach’s Theoricae planetarum novae. Summoned by Pope Sixtus IV, Regiomontanus went to Rome in 1475 to assist in reforming the …
- Regiomontanus biography – MacTutor History of Mathematics
Regiomontanus describes how the position of the Moon can be used to determine longitude in the Ephemerides for the years 1474-1506 which he published. This was printed on his own printing press which he set up in Nuremberg.
- Ephemerides dictionary definition | ephemerides defined
At a printing-press established in Walther’s house by Regiomontanus, Purbach’s Theoricae planetarum novae was published in 1472 or 1473; a series of popular calendars issued from it, and in 1474 a volume of Ephemerides calculated by Regiomontanus for thirty-two years (1474-1506), in which the method of “lunar distances,” for determining the longitude at sea, was recommended and explained.
- Encyclopædia Britannica, Ninth Edition/Regiomontanus …
Oct 19, 2011 · The ephemerides and calendars were published partly in German (Magister Johann von Kunsperk’s teutscher Kalender), partly in Latin (Ephemerides Astronomicæ, Nuremberg, 1473 or 1475, for the years 1475-1506; Kalendarium Novum, Nuremberg 1474, re-issued many times and translated into German and Italian).