artemis.fyi

Real-time mission tracker for NASA's Artemis program. Currently tracking Artemis II, the first crewed mission to the Moon since Apollo 17.

Live at artemis.fyi

Features

• Interactive trajectory visualization - 2D plot of the spacecraft's path with Earth, Moon, and phase-colored segments
• Mission timeline - Draggable scrubber with phase labels, milestone markers, playback controls
• Mission status panel - MET, current phase, next milestone, crew activity, live telemetry
• Telemetry charts - Distance, velocity, and range rate over time
• Crew activity schedule - Transcribed from NASA's published flight plan
• Milestone tracking - Mission milestones with completion status and countdown timers
• Deep Space Network status - Live ground station connections, signal strength, measured range (updates every 10s)
• Unit toggle - km/mi switching
• Live stream - Embedded NASA broadcast

Data Sources

• JPL Horizons API - spacecraft and Moon ephemeris data
• NASA DSN Now - live Deep Space Network ground station status (XML feed)
• NASA flight plan - crew activity schedule and milestones

Tech Stack

• Next.js 15 with App Router
• TypeScript, Tailwind CSS v4, shadcn/ui
• Recharts for telemetry charts
• SQLite (better-sqlite3) for trajectory data caching

Getting Started

npm install
npm run dev

On first load, the app fetches the full mission trajectory from JPL Horizons and caches it in a local SQLite database. Subsequent loads are instant.

Deploy

This repo includes a render.yaml blueprint for Render.com. Connect the repo and it will auto-deploy with a persistent disk for the SQLite database.

How It Works

1. Startup: Fetches spacecraft + Moon ephemeris from JPL Horizons for the full mission at 5-minute intervals
2. Caching: Stores all data points in SQLite with WAL mode for concurrent reads
3. Live updates: Every 5 minutes, checks for new data points from Horizons and backfills gaps
4. DSN: Polls NASA's DSN XML feed every 10 seconds for live ground station status
5. Frontend: Polls /api/telemetry every 60 seconds; MET clock ticks client-side every second
6. Playback: Timeline scrubber and play controls are fully client-side, using cached trajectory data

Future Missions

This project is designed to support future Artemis missions. The mission-specific configuration (launch time, milestones, crew, activities) is isolated in lib/milestones.ts, lib/activities.ts, and component data. The trajectory fetching and visualization infrastructure is reusable across missions.