Official description7 sourcesMCP servers8d ago

gregario/astronomy-oracle

Astronomical catalog data

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Config template (adjust for your client)

claude mcp add astronomy-oracle -- npx -y astronomy-oracle

A pasteable skeleton generated from the repository name. Check the project README for the exact package and arguments.

Star count: 3 ★ · gregario/astronomy-oracle · read from the repository page · (checked 2026-10-16 20:00:20)
Source: collected from the punkpeye/awesome-mcp-servers list · type: MCP server
Harvest history: first seen 2026-10-09 · last seen 2026-10-16 · seen 32× · listed by 7 sources
Score: score 703 · 3 ★ · 7 sources · mcp

FAQ (answers come from our records)

How do I install it?

We did not find an install command for this repository (our install coverage is only about 4%). Check its README or releases page.

Who is it for?

We filed it under these tags: MCP 服务. The tags come from the entry itself, not a taxonomy we imposed.

Who maintains it?

repository gregario/astronomy-oracle；first catalogued 2026-10-09；last seen 2026-10-16。There is no official certification or quality rating here — we record sources and dates only.

Third-party quality signals

Astronomy Oracle

以下摘录自该仓库的 README（片段） · 在 GitHub 读完整 README →

Accurate astronomical catalog data and observing session planner for LLM assistants. Stops hallucinated magnitudes, coordinates, and visibility.
Features
- **3 tools** for object lookup, catalog search, and observing session planning
- **13,000+ deep-sky objects** from the OpenNGC catalog (NGC, IC, Messier, and addendum objects)
- **Deterministic astronomy math** — Julian dates, sidereal time, alt/az conversion, rise/transit/set times
- **Zero network dependency** — all data is bundled, all calculations are local
Install
Run directly with npx:
Or install globally:
Configuration
Claude Desktop
Add to your claude_desktop_config.json:
Claude Code
Tool Reference
lookup_object
Look up a celestial object by Messier number, NGC/IC designation, or common name. Optionally compute visibility from a given location and time.
Returns detailed object data: type, coordinates (RA/Dec), magnitude, angular size, surface brightness, Hubble type, cross-references, and (when location is provided) current altitude/azimuth with rise/transit/set times.
search_objects
Search and filter the catalog by type, constellation, magnitude range, angular size, or catalog membership.
Returns a formatted table of matching objects sorted by brightness. Supports filtering by object type (Galaxy, Planetary Nebula, Open Cluster, etc.), constellation, magnitude range, minimum angular size, and catalog (Messier, Caldwell, NGC, IC).
plan_session
Generate an observing session plan for a given location and date. Returns the best objects to observe grouped by time window.
Returns objects grouped into three windows (evening, midnight, pre-dawn), scored by observability based on altitude, magnitude, and angular size.
Data Sources
| Source | License | Description |
| --- | --- | --- |
| OpenNGC | CC-BY-SA 4.0 | NGC/IC/Messier catalog with coordinates, magnitudes, dimensions, and cross-references |
The OpenNGC data is included under the Creative Commons Attribution-ShareAlike 4.0 International License. See the OpenNGC repository for full attribution.