lunar phases, perigee, apogee, passages through the nodes, first and last lunar visibility, occultations, eclipses), orbital parameters and more covering the time period AD 1200 to AD 2100. It calculates accurate geocentric or topocentric positional and physical ephemerides, times and circumstances of lunar events (e.g. The ephemeris calculation is based upon Steve Moshier's analytical ephemeris using trigonometric expansions for the earth and planets and the lunar ephemeris ELP2000-85 of Chapront-Touzé and Chapront for the moon, both adjusted to Jet Propulsion Laboratory's DE404 (see There are further adjustments in Alcyone Ephemeris, some optional, to JPL's more recent DE406, the most accurate long-term ephemeris.Īlcyone Lunar Calculator (ALC) provides detailed astronomical information on the Moon. Access to the complete Bright Star Catalogue, a calendar conversion tool, and an astronomical event calculator are available. In addition Alcyone Ephemeris offers a wealth of functionality: star chart generation, 3D-visualization of heliocentric and planetocentric orbits, plotting ephemeris data (as a function of time or in a parametric plot), searching for specific values, data export (Excel, HTML, XML, Text), scripting to write programs for more complex computations, and printing. It calculates heliocentric, geocentric, and topocentric positions of the Sun (Earth), planets, 18 natural satellites, and small bodies (minor planets and comets) in ecliptical, equatorial, and horizontal coordinates, with optional corrections for parallax and refraction rectangular coordinates, velocity, apparent diameter, magnitude, phase, lunar libration, orbital elements, differences for all of these, and more.

Alcyone Ephemeris 4.3 is an accurate and fast astronomical ephemeris calculator covering the period 3000 BC to AD 3000.

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