About the NASA Exoplanet Archive

The NASA Exoplanet Archive is an online astronomical exoplanet and stellar catalog and data service that collates and cross-correlates astronomical data and information on exoplanets and their host stars, and provides tools to work with these data. The archive is dedicated to collecting and serving important public data sets involved in the search for and characterization of extrasolar planets and their host stars. These data include stellar parameters (such as positions, magnitudes, and temperatures), exoplanet parameters (such as masses and orbital parameters) and discovery/characterization data (such as published radial velocity curves, photometric light curves, images, and spectra).

For an extensive overview of the archive's data, services and tools, see the published paper accepted by PASP, the technical journal of the Astronomical Society of the Pacific.

All data in the Exoplanet Archive are vetted by a team of astronomers (team roster) and are linked back to the original literature reference. Data are searchable either for an individual star or by stellar and planetary properties. The Exoplanet Archive offers direct access to frequently accessed data sets via an interactive table which allows sorting and filtering of the data. These data sets include:

Additionally, a breakdown of the exoplanet counts by discovery method is available on the Planet Counts page.

The NASA Exoplanet Archive Users Group advises the archive on content and functionality.

Tools for Working With Exoplanet Data

The NASA Exoplanet Archive includes several tools for working with exoplanet and stellar host data. For tips on using the archive effectively, read the FAQ and Tip Archive.

  • Interactive Tables for Planet Parameters: These interactive tables display data for various data sets, including confirmed planets, Kepler Objects of Interest (KOIs), Threshold-Crossing Events (TCEs) and target stellar data. Users can filter, sort and download or export to other Exoplanet Archive services, such as the light curve visualization for the Kepler stars.

  • Kepler Light Curve Viewer: Interactive display of user-selected quarters for a single Kepler target. Any column from the light curve file can be plotted with or without normalization and sent to the periodogram or phase tool.

  • Inventory Service/Search for Archive Holdings: A search tool that provides a list of all data in the Exoplanet Archive that corresponds to a user-specified object or location.

  • Predicted Observables for Exoplanets (POE): An observational planning tool that provides estimates of the Habitable Zone (HZ) parameters and predicted planet signatures (e.g. RV and astrometric wobbles, transit depths, etc.) for stars known to host exoplanets or KOIs, Mission Stars, or hypothetical stars. It can be applied to individual stars or to catalogs of stars from the archive.

  • Periodogram Service: This tool calculates the periodogram of time series data from the archive or a file uploaded by the user. The service supports three algorithms: Lomb-Scargle, Box-fitting Least Squares (BLS) and Plavchan. Phased light curves for the most significant periods are also available.

  • Transit and Ephemeris Service for Kepler Objects of Interest and Confirmed Planets: This service returns an ephemeris of the times of transit of the exoplanet across its host star. Optionally, for a given longitude and latitude or observatory, the service tabulates times of transit at that location and can calculate the time for secondary transits or other phase points in the orbit.

  • Application Program Interface (API): This service allows a user access to the contents of various data tables via a URL or command-line-based query.

  • Plotting and Histogram Tool: Create scatter plots and histograms from Confirmed Planet data.

  • Pre-generated Exoplanet Plots: These are presentation-ready plots that are generated daily with the most current information available in the Exoplanet Archive.

  • EXOFAST: A fitting tool that accepts transit light curves and/or radial velocity data and various inputs to create models of planet systems. This web service is based on the original code by Jason Eastman.

Transit Survey Data in the Exoplanet Archive

The Exoplanet Archive serves photometric time-series data from surveys that aim to discover transiting exoplanets, such as the Kepler Mission and CoRoT. The database provides access to over 75 million light curves from space and ground-based exoplanet transit survey programs, including:

Acknowledging the NASA Exoplanet Archive in Publications

Please include the following standard acknowledgment in any published material that makes use of the NASA Exoplanet Archive's Services.

"This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program."

In addition, if you use data from a specific literature reference, please acknowledge that reference directly.

Additionally, the American Astronomical Society (AAS) has a standardized list of facility keywords that include the NASA Exoplanet Archive. When preparing a LaTeX manuscript for submission, use \facility {Exoplanet Archive}. For more usage tips and the full list of standardized facility names, see the AAS web site.


The Exoplanet Archive offers search and filtering capabilities for exoplanets, Kepler candidates and time series data sets. A complete listing of the data in the Exoplanet Archive can be found here.

Related Resources

Kepler Astrophysics
Kepler Community Follow-up Observing Program (CFOP)
COnvection, ROtation & planetary Transits (CoRoT) Mission
Exoplanet Data Explorer
Exoplanet Encyclopedia
Planet Hunters

Last updated: October 12, 2018