Śani Sade Sati · Saturn Transit

Precise geocentric calculation · Lahiri ayanamsa · full lunar theory + nutation

IAU 2006 Standards Nutation Corrected Geocentric Ecliptic

Enter Your Details

Your exact birth date and local time

Date you want to check Saturn's position

Your Sade Sati Status

⏳ Enter birth details above to discover your Sade Sati phase
Δ = —°
Natal Moon (sidereal) —
Saturn Transit —
🌙 Moon Sign (Rāśi): — 🪐 Saturn Sign: —
✨ Nakṣatra: — ℞ Retrograde: —
IAU 2006 Lahiri · geocentric ecliptic · no topocentric correction · nutation included

What is Śani Sade Sati?

Sade Sati (साढ़े साती) is the 7½-year period when transiting Saturn (Śani) moves through the zodiac sign before, containing, and after your natal Moon sign. It is one of the most discussed transit periods in Vedic astrology — a time of profound restructuring, maturity, and karmic resolution.

🌘 Rising Phase

Saturn in sign before Moon · ~2.5 years · Preparation & anticipation

🔥 Peak Phase

Saturn in same sign as Moon · ~2.5 years · Core restructuring

🌗 Setting Phase

Saturn in sign after Moon · ~2.5 years · Integration & wisdom

Sade Sati is not a "curse" — it is a cosmic teacher. Many people experience career breakthroughs, spiritual awakening, and deep personal growth during this period. Awareness is empowerment.

Frequently Asked Questions

This calculator uses IAU 2006 precession standards with Lahiri ayanamsa, full lunar theory (over 60 correction terms), nutation corrections, and geocentric ecliptic coordinates. Planetary positions are computed from heliocentric orbital elements then converted to geocentric apparent positions. The precision is suitable for all astrological purposes.
When Saturn is retrograde (℞), it appears to move backward in the sky from Earth's perspective. In Vedic astrology, a retrograde Saturn intensifies its karmic influence — past unresolved matters may resurface for review. During Sade Sati, a retrograde Saturn can make the period feel more introspective and internally focused.
Sade Sati specifically refers to Saturn's transit relative to your natal Moon sign (not Sun sign or ascendant). The Moon represents the mind and emotions in Vedic astrology, making this transit particularly significant for mental well-being, emotional maturity, and life-direction shifts. It spans approximately 7.5 years across three zodiac signs.
The traditional guidance includes: practice patience, avoid unnecessary risks, focus on disciplined routines, engage in charitable acts (especially on Saturdays), chant the Mahamrityunjaya mantra or Hanuman Chalisa, and view challenges as opportunities for growth. Saturn rewards sincerity, hard work, and humility.

Astronomy Behind This Calculator

🌍 Geocentric Model

Positions are computed from Earth's center (geocentric), matching the Vedic astrological perspective. Saturn's heliocentric orbit is transformed using Earth's simultaneous position.

🌓 Lunar Theory

The Moon's longitude uses over 60 trigonometric correction terms accounting for solar perturbations, evection, variation, and annual equation — far beyond simple mean motion.

🔄 Nutation Correction

Earth's axis wobbles slightly (nutation), shifting the ecliptic by up to ±17 arcseconds. This calculator applies a 31-term nutation model for precision.

📐 Lahiri Ayanamsa

The sidereal-tropical offset uses the official Lahiri ayanamsa (Chitrapaksha), the standard adopted by the Indian government for Vedic astrological calculations.