erfa

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michealroberts / celerity

celerity is a lightweight, zero-dependency, research-grade native Python astronomy library for precise astronomical calculations and observation planning, with IAU 2006/2000A precession, nutation and aberration models tested for milliarcsecond-level conformance against ERFA.

python science astronomy ephemeris epoch astrometry erfa precession nutation iau aberration

Updated Oct 30, 2026
Python

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