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.
The following APIs are available. A solid understanding of JSON is necessary to make use of these APIs.
|Fireball||Fireball atmospheric impact data reported by US Government sensors|
|Horizons||Horizons system programattic (query-parameter-based) interface|
|Horizons File||Horizons system programattic (file-based) interface|
|Horizons Lookup||Horizons lookup service|
|JD Date/Time Converter||Julian Day number to/from calendar date/time converter|
|NHATS||Human-accessible NEOs data|
|Periodic Orbits||Interactive interface to database of periodic orbits|
|SB Close Approach||Asteroid and comet close approaches to the planets in the past and future|
|SB Identification||Small-body identification within a specified FOV at a specific time|
|SB Mission Design||Small-body mission design tool|
|SB Observability||Provides a list of small-bodies observable on a specific date|
|SB Radar||Small-body radar astrometry data|
|SB Satellites||Small-body satellite data|
|SBDB||Small-Body DataBase (SBDB) - primarily orbital data on all known asteroids and comets|
|SBDB Query||Small-Body DataBase (SBDB) query tool|
|Scout||NEOCP orbits, ephemerides, and impact risk data|
|Sentry||NEO Earth impact risk assessment data|
versionfield in the API output to detect any change (in which case, you should come back to this site to see what, if anything, in the data format/output changed).
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.
For additional NASA APIs, visit the webpage at https://api.nasa.gov/.