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Credits & Attribution

Data sources, libraries, and assets used by PERIGEE

PERIGEE is built entirely on public data and open-source software. Every feed, library, and texture it uses is credited below with a link and license.

Data sources

CelesTrakGP orbital elements
Satellite and debris GP element sets, courtesy Dr. T.S. Kelso.
NASA / JPL — CNEOS, Sentry & CADclose approaches · impact risk · fireballs
Close-approach data (CAD), Sentry impact-risk objects, and CNEOS atmospheric fireball events.
This app uses publicly available NASA/JPL data; it is not endorsed by NASA or JPL.
Global Meteor NetworkCC BY 4.0 — meteor trajectories & fall corridors
Daily camera-triangulated meteor trajectory summaries from GMN's worldwide station network, licensed CC BY 4.0. The FALL WATCH layer derives its meteorite-drop search corridors from these same trajectories — illustrative estimates from camera geometry only, with no wind or mass modeling. Data: Global Meteor Network (CC BY 4.0).
The Meteoritical Society — Meteoritical Bulletin Databasevia NASA Open Data — recovered meteorites
Recovered meteorite landings (name, class, mass, year, recovery coordinates) from the Meteoritical Society catalog, distributed through NASA's open-data portal. Witnessed falls plus the heaviest finds are plotted; "found" coordinates mark recovery sites, which can be far from the fall point.
This app uses publicly available NASA data; it is not endorsed by NASA.
NASA EOSDIS GIBS / Worldview Snapshotslive Earth imagery
Daily true-color VIIRS mosaics for the live Earth basemap — imagery courtesy NASA EOSDIS.
The Space Devs — Launch Library 2launch schedules
Upcoming and previous rocket launch data.
OpenStreetMap / NominatimODbL — geocoding
Place-name search © OpenStreetMap contributors, available under the Open Database License (ODbL).
The Hipparcos and Tycho Cataloguespublic domain
ESA (1997), ESA SP-1200, CDS I/239. Positions, magnitudes and B−V colour indices for the ~95,000 stars to magnitude 9.5 behind the star field in both the globe and SKY VIEW.
JPL Solar System Dynamicspublic domain
Approximate positions of the major planets (Standish): the Keplerian elements behind every planet drawn on the globe and in SKY VIEW.

Textures

Solar System ScopeCC BY 4.0
Earth day, night, and cloud textures.
three.js examplesMIT
Earth normal/specular maps and the moon texture.
ESO / S. BrunierCC BY 4.0
The 360° Milky Way panorama. Every star is filtered out of it (scripts/make-milkyway.py); what is left is the diffuse galactic band drawn behind the catalog stars in both views.

Software

three.jsMIT
WebGL rendering.
satellite.jsMIT
SGP4/SDP4 orbital propagation and coordinate transforms.
LucideISC
Interface icons.
Chakra Petch & Azeret MonoOFL — via Fontsource
Display and monospace typefaces.

PERIGEE

PERIGEE itself is open-source software, MIT licensed © Andrew Malik.

Support

Questions, bug reports, or feedback about PERIGEE — including the iOS app and PERIGEE Pro subscriptions — are welcome at hello@perigee.earth. We aim to reply within a few days.