Ephemeris Software

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 and more.

What Watch is a powerful tool that covers many areas and techniques of astrology. One key feature is its ability to follow closely transit and progression cycles. The program creates ephemeris lists for any given combination of planets providing dates of the transit itself, of stations and of sign changes. Other features include chart wheels, synastry, composite, relocation, lunar phases, solar returns. What Watch has a built-in, extensive tuto..

Planet's Orbits (for Windows 98/ME/2000/XP) is an accurate digital orrery with a wealth of functionality. The program uses the DE404 ephemeris (accurate for dates between 2000 B.C. and 6000 AD) for the calculation of planetary (except Pluto) and lunar positions. The calculation of the positions of the satellites of Jupiter, Saturn, and Uranus is done by the various analytic theories given in the Explanatory Supplement to the Astronomial Almanac.