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About the 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 Exoplanet 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. The 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).

All data in the Exoplanet Archive are vetted by a team of astronomers 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.

Tools for Working With Exoplanet Data

The NASA Exoplanet Archive includes several tools for working with exoplanet and stellar host data.

  • 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.

  • 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 Calculations: 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 the exoplanet and host star table and the Kepler candidate table via a URL or command-line-based query.

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 700,000 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."


Holdings

The Exoplanet Archive offers search and filtering capabilities for exolanets, Kepler candidates and time series data sets. All data in the Exoplanet Archive are vetted by a team of astronomers and are linked to the original literature references.

The Exoplanet Archive supports interactive visualization of images, spectra, and time series data. The Exoplanet Archive maintains its own stellar cross-identification to minimize ambiguity in multiple star components.

The Exoplanet Archive offers direct access to frequently accessed tables:

The Exoplanet Archive has a dedicated interface for transit survey data sets. The Exoplanet Archive also serves the public Kepler light curves. The Exoplanet Archive is the U.S. portal to the public CoRoT mission data for both the Exoplanet and Asteroseismology data sets. The Exoplanet Archive also serves ground-based transit survey data including the TrES observations of the Kepler field and KELT observations of the Praesepe field.

Stars in the Exoplanet Archive

  • Exoplanet host stars
  • Stars in transit survey programs

Stellar and Exoplanet Content

Exoplanet Content Stellar Parameters
Published parameters for known exoplanets  
Published Parameters Published Parameters
  • Number of Planets
  • Planetary Mass
  • Orbital Period
  • Orbital Semi-Major Axis
  • Orbital Eccentricity
  • Link to Exoplanet Encyclopedia Entry
  • Position, Distances
  • Kinematics
  • Photometry, Colors
  • Spectral type
  • Luminosity Class
  • Metallicity
  • Rotation
  • Activity Indicators
  • Variability
  • Multiplicity
Predicted Parameters Derived Parameters
  • Habitable Zone
  • Astrometric Wobble
  • Radial Velocity Wobble
  • Earth-sized Transit Depth
  • Jupiter-sized Transit Depth
  • Temperature
  • Luminosity
  • Radius
  • Mass
  • LSR Space Motion
Associated Data Associated Data
  • High-contrast images
  • Light curves of transiting systems
  • Radial velocity curves of exoplanet systems
  • Images
  • Spectra
Examples of Associated Data
  • Next 2000 (N2K) Stars template spectra
  • Coronographic images from Palomar
  • 2MASS image mosaics

Exoplanet Transit Survey Service Content

The transit survey data currently contained within the Exoplanet Archive include:

  • Data Release 1 of the XO Project
  • Observations by the Hungarian-made Automated Telescope Network (HATNet)
  • Public Observations by the Kepler Mission.
  • Observations by the Convection, Rotation, Transit (CoRoT) Satellite.
  • Observations of the Kepler field by the Trans-atlantic Exoplanet Survey (TrES)
  • Observations of the Praesepe field by the Kilodegree Extremely Little Telescope (KELT)
  • Observations of NGC2301 by Howell et al.
  • Observations of NGC3201, M10, and M12 by von Braun et al.

Exoplanet Transit Survey Content

Survey Region Number of Objects Time-Series Filter Additional Static Filters Time Span (days) Number of Epochs Number of Light Curves
XO 2047 W (XO) JHK (2MASS) 486 < ~3500 2047
HATNet 2656 I/R Cousins JHK (2MASS), BV Johnson, I Cousins 1996 ~1100 - ~12000 6047
Kepler Field 195330 CCD White light g, r, i, z, J, H, & Ks 682 ~500 - ~50000 1064815
CoRoT-Exoplanet 96568 CCD White light and 3 color Prism B, V, R, & I ~900 3400 – 396000 97971
CoRoT-Seismology 84 CCD White light V ~900 68000 – 420000 85
TrES-Lyr1 25947 r, R B, V 75 ~15000 25947
KELT-Praesepe 66637 RK 73 ~3000 66637
NGC 2301 3961 R B, R 14 ~150 3961
NGC 3201 58666 V, I V, I 700 ~120 58666
M 10 43930 V, I V, I 500 ~50 43930
M 12 32378 V, I V, I 500 ~50 32378

Related Resources

Kepler Astrophysics
COnvection, ROtation & planetary Transits (CoRoT) Mission
ADS
CDS
CXC
HEASARC
KOA
MAST
NED
VAO
Exoplanet Data Explorer
Exoplanet Encyclopedia
Planet Hunters

NASA IPAC NExScI Caltech

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