The industry-standard planetary calculation library that powers most modern astrology software, providing arc-second-level accuracy across a 30,000-year span.
Swiss Ephemeris is a high-precision astronomical calculation library built on NASA's JPL DE431 planetary data. It is widely regarded as the gold standard for astrological computation, handling planet positions, house cusps, fixed stars, asteroids, and sidereal zodiacs with sub-arc-second accuracy from 13201 BCE through 17191 CE. TriAstra holds a commercial Swiss Ephemeris Professional License.
TriAstra uses Swiss Ephemeris as the sole calculation engine for every chart — Western, Vedic, and Saju solar term boundaries. Every planet position, aspect, dasha period, and Jeol-gi cutoff you see is computed from the same ephemeris data professional astrologers rely on.
Your chart positions are as accurate as the highest-precision professional astrology software in the world. Planetary positions, house cusps, and time boundaries match the standards used by serious astrology practitioners.
Understanding Swiss Ephemeris is just the beginning. See how it manifests in your unique birth chart with TriAstra's triple-system analysis.
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