Welcome to JPL’s SSD (Solar System Dynamics) and CNEOS (Center for Near-Earth Object Studies) API (Application Program Interface) service. This service provides an interface to machine-readable data (JSON-format) related to SSD and CNEOS.

If you are looking for human-readable data, please go to the main websites for SSD and/or CNEOS.

APIs Available

The following APIs are available. A solid understanding of JSON is necessary to make use of these APIs.

API Description
CAD Asteroid and comet close approaches to the planets in the past and future
Fireball Fireball atmospheric impact data reported by US Government sensors
Mission Design Mission Design - Small-body mission design suite
NHATS Human-accessible NEOs data
SBDB Small-Body DataBase (SBDB) - primarily orbital data on all known asteroids and comets
Scout NEOCP orbits, ephemerides, and impact risk data
Sentry NEO Earth impact risk assessment data

Important Notes

REST Compliance

Every attempt has been made to ensure our APIs follow the REST architecture style. Although URI path mapping is often associated with REST APIs, they are not a requirement of REST. Because these APIs only get data from a database (no updates or deletes), query parameters are specified instead of using URI path mapping. Similarly, only GET and POST HTTP-request types are supported.

NASA API Service

For additional NASA APIs, visit the webpage at