NASA JPL SSD/CNEOS API service

NASA JPL SSD/CNEOS API service

JPL's Solar System Dynamics and Center for Near-Earth Object Studies API service. The site says: "This service provides an interface to machine-readable data (JSON-format) related to SSD and CNEOS." No key is needed.

Coverage

The site lists these APIs: Fireball, Horizons, Horizons File, Horizons Lookup, JD Date/Time Converter, NHATS, Periodic Orbits, SB Close Approach, SB Identification, SB Mission Design, SB Observability, SB Radar, SB Satellites, SBDB, SBDB Query, Scout and Sentry. The close-approach API is documented at "Version: 1.5 (2023 March)" and defaults to "NEO Earth close-approaches less than 0.05 au in the next 60 days sorted by date". History start, update frequency and delay: Not stated.

Verdict

JPL asteroid and comet data: close approaches, fireball detections, Sentry impact risk, Scout, NHATS, the Small-Body DataBase and Horizons ephemerides, all keyless JSON. The binding condition is the Fair Use Policy, not a licence: "You agree to submit only one API request at a time (no simultaneous requests)." and "Applications making automated connections must provide a valid, application-specific User-Agent request header that includes correct product name, version, and contact information." Browser-side use is ruled out: "You may not embed these APIs in your website (per NASA CORS policy)." JPL also says "You understand that API data formats can change without notice." and asks clients to check the version field. Attribution: Not stated on the API page. Signal Lab links only.