Sun/Moon by Meeus series (≈±1′, topocentric Moon optional); planets by JPL elements + precession of date
— Guru/Śani ≈±0.1–0.2° worst case, ingress dates good to a few days. Rāhu/Ketu: true node (drik) by default.
Lahiri ayanāṁśa · whole-sign. For guidance and self-reflection — not a substitute for a qualified Jyotiṣi.