Ephemerides and nautical almanac

Astronomical navigation

 

 

 

 

NAUTICAL ALMANAC- 2025

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The text contains the ephemerides of the stars, the Sun, the Moon and the planets. Correction tables of altitudes and astronomical phenomena.

CONTENTS OF THE ALMANAC

Presentation
index
description of the ephemerides

Part one:
daily ephemerides of the Sun, Moon and planets
twilights, transits, rising, setting
correction for rising and setting
equation of time

Part two:
interpolation
corrections to the heights measured with the sextant
formulary
correction tables
depression of the horizon
atmospheric refraction
parallaxes and semi-diameters
corrections for the Moon

Part three:
chronological cycles and movable holidays
time
visibility of the planets
phases of Venus
eclipses of the Sun
equinoxes and solstices
eclipses of the Moon
apogees and perigees of the Moon
phases of the Moon
nautical stars and related constellations
northern celestial hemisphere
southern celestial hemisphere
disclaimer

Click here to learn more.

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Astronomical navigation software.

High precision ephemerides based on the planetary theory VSOP87 and the lunar theory Elp-2000/82 of Bretagnon and Francou. Bureau des Longitudes.

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This site is devoted to astronomical navigation with the use of the sextant.
In it you can find the nautical Ephemeris and various software for nautical and Astronomy.

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