Swiss Ephemeris .se1 data files for 1800-2399 CE. Optional companion to @kuntay/swisseph — upgrades calculations from the built-in Moshier theory to the full JPL DE441-derived ephemeris.

Swiss Ephemeris 2.10.03 compiled to WebAssembly. High-precision astronomical and astrological calculations for Node.js, browsers, Deno and Bun.

WASM bindings for XALEN Ephemeris — run in any browser or Node.js

Kontour's external time actor: a deadline engine (data-derived freshness wake-ups that nudge Flow) plus a pure recurring-schedule core (cron/at/every, timezone/DST-aware, catch-up). It triggers; it never authors.

An astrological charting library, backed by the Morphemeris ephemeris API.

High-precision Vedic Panchangam calculations using Swiss Ephemeris

Deterministic modern Western astrology natal-chart MCP server: JPL-Horizons-verified ephemeris, honest degradation when birth time is unknown, Chinese-first output

Free Human Design API & Gene Keys API — the most tested, Swiss-Ephemeris-validated pure-JS engine for bodygraphs (Type/Authority/Profile), Gene Keys hologenetic profiles and extended astrology (Ascendant/MC/houses). No native build, no ephemeris data file

Clean-room, dual-licensed (AGPL-3.0/commercial) ephemeris: geocentric ecliptic longitudes for Sun–Pluto, Moon, Eris, the major asteroids, Chiron, and the Uranian TNPs, plus house cusps and a corrected ΔT.

MCP server exposing server-computed planetary positions (Swiss Ephemeris), validated against JPL Horizons (NASA). Plug any LLM/agent into the real sky: 19 astrology tools, never hallucinated.

the minimum kind of ephemeris

Swiss Ephemeris compiled to WebAssembly. Lightweight, TypeScript-first astronomical/astrological calculations for browser, Node, and Angular apps.

ESM/WebAssembly bindings for the CalcChineseCalendar lunar ephemeris, astronomy, and calendar engine.

JavaScript implementation of Moshier's ephemeris calculations for sun, planets, comets, asteroids and stars.

Ephemeris, natal chart, transits, aspects and Jyotish (Ashta Kuta). Pure JavaScript, no Python.

Medieval music analysis: GABC plainchant exports, liturgical calendar, tuning systems, ephemeris, and the harmony of the spheres

Chinese lunisolar calendar with second-accurate JPL DE440 solar terms. Zero runtime dependencies. Absolute-instant and wall-clock semantics are distinct types.

This package will return ephemeris

n8n community node for MysticAPI — deterministic Human Design–compatible bodygraphs, personal sky charts, and ephemeris.

Browser-shippable Vedic/sidereal computation: ayanamsa, nakshatra, divisional (varga) charts, panchanga, and Vimshottari dasha. Companion to kriya-ephemeris and kriya-ephemeris-timelords -- separate package so pros who don't use Vedic mode don't pay its b