NaamSetu guides
High Precision Astronomy: How DE440s Computes Every Chart
Why NaamSetu uses NASA JPL DE440s ephemeris files to compute exact planetary longitudes without interpolation.
Every chart, panchang anga, and planetary longitude on NaamSetu is calculated on demand using NASA JPL DE440s astronomical ephemeris data.
Test precision chart calculations on our [Kundali Calculator](https://kundali.naamsetu.in/kundali).
## Why High Precision Ephemeris Matters Traditional table lookups (Panchang tables) often interpolate coordinates between major cities or days. NaamSetu computes exact celestial vectors for your precise latitude, longitude, and timezone.
## Lahiri Ayanamsa Integration Planetary positions are adjusted using the official Lahiri (Chitrapaksha) Ayanamsa to deliver authentic Vedic sidereal coordinates.
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