FOUNDATIONS
Sidereal zodiac and ayanamsha
The sidereal zodiac applies an ayanamsha to relate the zodiac to a stellar reference rather than the seasonal tropical origin.
Why signs can change
The tropical and sidereal zodiacs use different zero points. A graha can therefore appear in different signs while its observation time and location remain unchanged.
Supported reference frames
Synastry supports Lahiri (Chitrapaksha), B. V. Raman, and Krishnamurti ayanamshas. The selected mode, exact ayanamsha value, Swiss Ephemeris source, and node mode are recorded with the chart so the result remains reproducible.
No universal default claim
The app defaults to Lahiri because it is widely used, not because every Jyotisha school treats one ayanamsha as the only legitimate choice.
Continue reading
This is the complete app reference, preserved as educational content. Descriptions of app features, Premium tools and guide-only techniques do not mean every described calculation is available on the website. Astrology and numerology are symbolic traditions, not scientific measurements, diagnoses or guarantees.
Published by Synastry, a Sableon product. Calculation methods, sources and corrections ↗