Zodiac System Selection
Select the zodiac framework for position calculations. Cygnus supports two zodiac systems that differ in how they define the starting point of the zodiac.
Selecting a Zodiac System
Select a zodiac system from the Zodiac dropdown in the study configuration panel.
Available Systems
- Tropical -- The zodiac is aligned with the equinoxes. The first point of Aries corresponds to the spring equinox. This is the system used by most Western astrologers.
- Sidereal -- The zodiac is aligned with fixed star constellations. Positions are offset from tropical positions by the ayanamsa (the precession of the equinoxes). Vedic (Jyotish) astrologers primarily use this system.
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The choice of zodiac system affects the Sign Position metric. Longitude values remain the same in both systems; only the sign-based representation differs.