JSPM

Curated, well-tested orbital mechanics and dynamics formulas (e.g., Newtonian gravity, vis-viva, Kepler's 3rd law, escape/circular speeds, specific energy, specific angular momentum, peri/apoapsis radii).

Time and epoch utilities for space applications (e.g., building blocks toward Julian dates, conversions, and ephemeris-friendly time handling).

Shared TypeScript types (e.g., 3D tuples, equation result interfaces) used across the monorepo to keep APIs predictable and safe.

Authoritative physical and astronomical constants in SI units for consistent calculations.

A lightweight TypeScript utility to convert measurements between unit systems like metric and imperial.

KotUniL JavaScript/TypeScript library covers all units of International System of Units (SI) like meter, second etc. (see Wikipedia: https://en.wikipedia.org/wiki/International_System_of_Units) as well as SI- Prefixes (micro, nano etc.) and some other co

Comprehensive units of measurement dataset — 138 physical quantities, conversion factors, 11 measurement systems

Compile-time dimension safety for TypeScript with zero runtime cost