1. Core Standards (Most Commonly Used)
JyotishGrid supports over 40 Ayanamsa standards, but three dominate professional practice:
Lahiri (Chitra Paksha)
Status: The Gold Standard.
Context: Adopted by the Indian Government’s Calendar Reform Committee. It uses the star Chitra (Spica) as the 180° anchor point.
When to use: For standard Natal analysis, Dasha calculations, and creating general Horoscopes.
Krishnamurti (KP)
Status: Essential for KP System practitioners.
Context: Based on Lahiri but with a slight sub-second adjustment to align with the unique "Sub-Lord" calculations of the KP system.
When to use: Specifically for the KP System and high-precision event timing.
Raman
Status: Traditional / Individual Standard.
Context: Promoted by the legendary B.V. Raman. It differs from Lahiri by about 1° 27'.
When to use: If you follow the Raman school of thought or if your lineage uses traditional South Indian standards.
2. Specialized & Ancient Types
Yukteshwar: Used in the Holy Science by Sri Yukteswar Giri. It assumes a 24,000-year cycle of the equinoxes.
Surya Siddhanta: Derived from the ancient astronomical text. It uses a different rate of precession.
Nadi: A specific standard used in classical Nadi Astrology (e.g., Bhrigu Nandi Nadi).
True Citra / True Pushya: Modern astronomical calculations that track the exact movement of Spica or Pushya stars rather than an average fixed point.
3. Impact on Your Analysis
Changing the Ayanamsa can shift:
Planet Positions: A planet at 1° Aries might move to 6° Pisces if you switch from Raman to Lahiri.
Dasha Timing: Since Dashas depend on the Nakshatra of the Moon, a 1-degree shift can change a child's balance of Dasha by months or years.
Divisional Charts: Divisional charts (D9, D10) are extremely sensitive. A tiny Ayanamsa shift can move a planet to a different sign in the Navamsha.
4. How to Set Ayanamsa in JyotishGrid
Global Default: Go to Settings > Preferences to set your preferred Ayanamsa for all future clients.
Client Overlay: When creating a new client, you can choose a specific Ayanamsa if you want to experiment with different standards for that specific individual.
Quick Toggle: Use the Settings Icon in the header of any analysis screen to switch Ayanamsas on the fly and see the charts update in real-time.
TIP
Consistency is Key: Unless you are performing deep research, it is recommended to stick to Lahiri (Chitra Paksha) as it provides the most consistent results for traditional Parashari analysis.