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#ephemeris

Every repository in the public record carrying this tag — from its GitHub topics or the keywords its package registries publish. Health is measured under the same versioned methodology as the rest of the record.

11 records
Tagged “ephemeris”Ranked by health index
PyPI · crates.io
90Excellenthealth index
nyx-space/anise
A thread-safe alternative to NASA SPICE toolkit, computing spacecraft, planetary, coordinate frame, instrument transformations, ground station visibility, and orbital elements. Engineered for high-throughput Python concurrent execution and flight software, with proven lunar flight heritage.
Rust · Python★ 266↓ 45.4K/moAug 22, 2026
MPL-2.0Aug 22, 2026 · metrics 2.10.0
PyPI
80Excellenthealth index
TheDaniel166/moira
Astronomy-first pure-Python ephemeris and astrology computation engine with transparent, auditable calculations.
Python★ 33↓ 9,470/moSep 5, 2026
MITSep 5, 2026 · metrics 2.10.0
PyPI
78Goodhealth index
g-battaglia/kerykeion
Data-Driven Astrology 💫 Kerykeion is a Python library for astrology. It generates SVG charts and extracts detailed structured data for birth charts, synastry, transits, composite charts, and more.
Python★ 700↓ 123.6K/moSep 5, 2026
AGPL-3.0Sep 5, 2026 · metrics 2.10.0
crates.io · PyPI
77Goodhealth index
ssmichael1/satkit
Satellite and Orbital Dynamics Toolkit
Rust · Python★ 86↓ 12.4K/moAug 28, 2026
Apache-2.0Aug 28, 2026 · metrics 2.10.0
npm
75Goodhealth index
observerly/astrometry
observerly’s lightweight, zero-dependency, type-safe astrometry library for TypeScript. Accurately determine the positions of the Sun, Moon, and planets, handle coordinate transformations with ease, calculate transit times for any celestial object, and integrate precision astronomy into your projects with clean, dependency-free code.
TypeScript★ 29↓ 2,220/moAug 5, 2026
MITAug 5, 2026 · metrics 2.10.0
crates.io
73Goodhealth index
nightwatch-astro/skymath
Planning-grade astronomy math for astrophotography tooling
Rust★ 0↓ 2,523/moJul 25, 2026
MPL-2.0Jul 25, 2026 · metrics 2.10.0
Go
65Goodhealth index
TuSKan/astrogo
Pure Go Astropy-inspired astronomy and observatory-planning toolkit
Go★ 1Jul 17, 2026
MITJul 17, 2026 · metrics 2.10.0
PyPI
60Moderatehealth index
g-battaglia/libephemeris
High-precision Python ephemeris — NASA JPL DE440/DE441 via Skyfield, Swiss-Ephemeris independent, compatible API.
Python★ 15↓ 1,417/moAug 22, 2026
AGPL-3.0Aug 22, 2026 · metrics 2.10.0
npm
57Moderatehealth index
prolaxu/swisseph-wasm
A high-precision JavaScript wrapper for the Swiss Ephemeris WebAssembly module, providing professional-grade astronomical calculations for astrology, astronomy, and related applications.
JavaScript · C★ 35↓ 7,393/moJul 30, 2026
Custom licenseJul 30, 2026 · metrics 2.10.0
PyPI
53Moderatehealth index
RedSC1/py-ephemeris
Python bindings for Taiyin Ephemeris
Python · C++★ 0↓ 6,206/moAug 21, 2026
MPL-2.0Aug 21, 2026 · metrics 2.10.0
npm
42Weakhealth index
swisseph-js/swisseph
A modern, type-safe TypeScript wrapper for the Swiss Ephemeris library - high precision astronomical calculations for astrology and astronomy applications.
C★ 5↓ 10.5K/moJul 29, 2026
AGPL-3.0Jul 29, 2026 · metrics 2.10.0