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| JPL Small-Body Database | |
|---|---|
| Name | JPL Small-Body Database |
| Type | Astronomical database |
| Owner | Jet Propulsion Laboratory |
| Country | United States |
| Languages | English |
JPL Small-Body Database The JPL Small-Body Database is an online catalog and ephemeris service maintained by the Jet Propulsion Laboratory that provides orbital elements, physical parameters, and observational histories for small Solar System bodies including asteroids, comets, and near‑Earth objects. It supports mission planning, planetary defense, and astronomical research by combining astrometric observations, dynamical models, and published physical data to produce orbit solutions, covariance matrices, and close‑approach predictions.
The database is hosted by the Jet Propulsion Laboratory and operates within a framework used by teams associated with the United States Space Surveillance Network, the International Astronomical Union Minor Planet Center, and mission groups from NASA and the European Space Agency. It covers objects cataloged by surveys such as LINEAR, Catalina Sky Survey, Pan-STARRS, and the Sloan Digital Sky Survey, and it is used by researchers from institutions like Caltech, MIT, and the California Institute of Technology. The service supplies ephemerides compatible with tools developed by the Space Telescope Science Institute, the Harvard-Smithsonian Center for Astrophysics, and the United Kingdom Space Agency for follow-up observations.
Entries include osculating orbital elements (semimajor axis, eccentricity, inclination), orbital covariance, barycentric and heliocentric state vectors, absolute magnitude (H), slope parameter (G), estimated diameter, albedo, rotation period, spectral taxonomy, and pole solutions when available. Parameters are presented alongside provenance from surveys such as Pan-STARRS, NEOWISE, and observations reported to the Minor Planet Center and the International Astronomical Union. The database links to designations assigned by the Minor Planet Center, discovery credits associated with observatories like Kitt Peak and Mauna Kea, and identifiers used by missions such as OSIRIS‑REx, Hayabusa2, and Rosetta.
Primary inputs include astrometric measurements from observatories like Palomar Observatory, Cerro Tololo Inter-American Observatory, and the Mauna Kea Observatories, photometry from missions such as NEOWISE and Gaia, and radar astrometry from facilities like Goldstone and Arecibo. The orbit determination pipeline uses integrators and force models developed for planetary dynamics employed in trajectories for missions including Voyager, Cassini, and New Horizons, incorporating perturbations from planets defined by ephemerides like DE430 and DE440. Covariance estimation relies on statistical treatments similar to those used in navigation teams at JPL and in the Jet Propulsion Laboratory's Solar System Dynamics group.
Users query the service through a web interface and programmatic APIs compatible with Python, JavaScript, and command-line tools used by teams at the Space Telescope Science Institute and the SETI Institute. Downloadable products include SPICE kernels used by the Navigation and Ancillary Information Facility, formatted ephemerides for use with software such as GMAT and Orekit, and integration with visualization platforms employed by the Smithsonian Astrophysical Observatory and the European Southern Observatory. Data export formats support Virtual Observatory protocols used by the International Virtual Observatory Alliance and are compatible with tools developed at the Harvard-Smithsonian Center for Astrophysics.
The database underpins planetary defense analyses performed by NASA’s Planetary Defense Coordination Office and supports mission design for sample-return missions like OSIRIS‑REx and Hayabusa2. It is used in academic studies at institutions such as Caltech, MIT, and the University of Arizona to study asteroid families, collisional evolution, and dynamical lifetimes, and by planetary scientists working with Rosetta, Dawn, and Lucy mission teams to refine encounter geometry. Amateur and professional observers use ephemerides for follow-up observations coordinated with organizations like the Minor Planet Center and the International Astronomical Union.
Developed at the Jet Propulsion Laboratory with contributions from teams at Caltech and NASA, the service evolved from earlier ephemeris products used during Project Apollo and later for missions including Pioneer and Viking. Over time it absorbed data flows from modern surveys like LINEAR, Catalina Sky Survey, and Pan-STARRS and incorporated thermal data from NEOWISE and astrometry from Gaia, adapting software practices influenced by the Navigation and Ancillary Information Facility and the Solar System Dynamics group. Collaborative interfaces were established with the Minor Planet Center and with mission teams from ESA, JAXA, and Roscosmos to support both scientific research and operational requirements.
Accuracy varies with observational coverage and data quality: well‑observed objects such as (1) Ceres, (4) Vesta, and (433) Eros have highly constrained orbits and physical parameters, while recently discovered Near‑Earth Objects from surveys like Pan-STARRS or LINEAR may have large orbital uncertainties and covariance ellipses that affect impact probability estimates used by the Planetary Defense Coordination Office. Non‑gravitational forces affecting comets and small asteroids—modeled for missions like Rosetta and OSIRIS‑REx—can introduce additional uncertainty. Users relying on the database for mission design or hazard assessment commonly cross‑validate with independent solutions from the Minor Planet Center, DE ephemerides, and radar astrometry from Goldstone and Arecibo.
Category:Astronomical databases