The tropical reference
The tropical zodiac starts at the March equinox and divides the ecliptic into twelve equal 30-degree signs. It is connected to the seasonal reference frame rather than the modern boundaries of astronomical constellations. This is the system used throughout Find My Moon Sign.
The sidereal reference
Sidereal zodiacs use a reference tied to the stars and an offset called an ayanamsa. Different traditions use different offsets. A tropical sign may therefore differ from the sign in a sidereal or Vedic chart for the same instant.
Compare consistent settings
When checking another calculator, compare the zodiac, ayanamsa if applicable, timezone and UTC instant. Neither sign should be presented as an accidental arithmetic correction to the other. We do not currently provide a Vedic calculator.
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