DIRECT ANSWER
A Nakshatra is one of the traditional lunar mansions of the sidereal zodiac. A birth Nakshatra is determined from the Moon’s sidereal longitude under the declared ayanamsa.
Calculation
ASTRODHI calculates the Moon position first, then determines the Nakshatra and Pada from that longitude.
Why it matters
Nakshatra is used in traditional interpretation and in the starting balance of Vimshottari Dasha.
Method transparency
The zodiac, ayanamsa, node policy and ephemeris version are part of the calculation provenance.
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