Computer Programs for Astrogeographical Research - ASTROGEO & SINEWAVE

These two programs are intended to be used as astrogeographia research tools in conjunction with the book Astrogeographia and the Bible of Astrology by Robert Powell and David Bowden. Finding the answers to astrogeographia research questions is greatly facilitated by these programs, because they can easily compute what otherwise must be done as many time consuming hand-calculations. From their output, pictures begin to build and insights are gained. When more precise research is suggested, it can be checked out by calculating with full accuracy star data from an ephemeris.

You can order these programs by calling the Sophia Foundation administrative office directly at (415) 522-1150, or by sending us an e-mail at This e-mail address is being protected from spambots. You need JavaScript enabled to view it . The purchase price iis $40.00 USD plus a $3.50 shipping and handling fee if ordered from within the United States. If ordering from outside the United States please contact the Sophia Foundation directly for shipping and handling fees.

Astrogeo and Sinewave work with any 32-bit Windows operating system. N.B. NOT WORK with 64-bit Windows systems.

ASTROGEO program

This program calculates a star's projection onto the Earth, or the reverse calculation of finding which star corresponds to a given place on Earth. It is based on the astrogeographia equations of latitude and longitude described in the book, and can calculate these equations for any year in the range from 2950 BC to 2950 AD. Accuracy over the 5900 years is about 0.1°, which corresponds to 6.9 miles (11.1 km) on the surface of the Earth.

SINEWAVE program

This program calculates a star's declination journey and its projection onto the Earth over the many thousands of years of the Earth's precession cycle. It is based on the sinewave formulas described in the book, which can be calculated for any year from 20,000 BC to 20,000 AD. Accuracy is mostly within 0.1° over 40,000 years, which corresponds to 6.9 miles (11.1 km) on the surface of the Earth. A worst case error of about 1° can sometimes occur, which corresponds to 69 miles (111 km) on the surface of the Earth.