Thriving 
TS observerly’s lightweight, zero-dependency, fully tree-shakeable, type-safe astrometry library for TypeScript. Sun, Moon, planet and satellite (SGP4) positions, IAU 2006/2000A apparent places, ICRS, ecliptic, galactic and horizontal frame transformations, and transit times, conformance-tested against ERFA (IAU SOFA) to the milliarcsecond.
https://www.npmjs.com/package/@observerly/astrometry ↗ HEALTH ? 96 / Healthy