alcyone software

Alcyone Ephemeris is speedy astronomical ephemeris calculator from 3000 BC to AD 3500. It calculates helio/geocentric & topocentric positions of Sun, Moon & planets with precision.

Planet's Orbits is a digital orrery software for Windows that accurately calculates planetary orbits using the DE404 ephemeris, giving information between 2000 B.C. and 6000 AD. The software offers advanced functionality and doesn't include Pluto.

C88 is an amateur astronomer's informational tool that offers comprehensive details on celestial sphere objects that can be seen with the naked eye or modest amateur telescopes for observing deep sky objects.