Alcyone Ephemeris is an accurate and fast astronomial ephemeris calculator covering the period 3000 BC to AD 3500.

It calculates heliocentric, geocentric, and topocentric positions of the Sun (Earth), Moon, and planets in ecliptical, equatorial, and horizontal coordinates, with optional corrections for parallax and refraction; rectangular coordinates, velocity, acceleration, apparent diameter, magnitude, phase, lunar libration, orbital elements, differences for all of these, and more.

In addition Alcyone Ephemeris offers a wealth of functionality: plotting ephemeris data, searching for specific values, scripting to write programs for more complex computations, saving in the as HTML files to export output to spreadsheets, word processors and web pages, and printing.

Alcyone Ephemeris keywords: ephemeris, ephemerides, astronomy, planetary positions, lunar positions, celestial mechamics