Exoplanet Orbital Parameters and Host Star Properties

NASA HEASARC's Exoplanet Orbit Database contains well-determined orbital parameters and host star properties for planets discovered via radial velocity and transit methods. The database compiles fundamental transit parameters, stellar data, and discovery methods from peer-reviewed literature. It is updated within a day of changes to the source file.

Use Cases

• Analyze correlations between exoplanet mass and orbital period using reported orbital parameters.
• Compare selection biases between radial velocity and transit survey methods documented for each planet.
• Investigate the semi-major-axis distribution differences between multi-planet and singleton planetary systems.

Strengths

• Data is sourced from peer-reviewed articles, ensuring a foundation of validated scientific measurements.
• Updates are applied rapidly, typically within a day of the source file being revised.
• Includes parameters from multiple discovery methods, specifically radial velocity and transit measurements.

Limitations

• The specific number of exoplanet records, columns, and total data size are not provided in the input.
• Data is limited to planets with robust, well-measured orbital parameters, potentially excluding newer or less-certain discoveries.
• File formats include BIN and HTML, which may require specific tools for access and analysis compared to common tabular formats.

Provenance

Source

National Aeronautics and Space Administration (NASA) High Energy Astrophysics Science Archive Research Center (HEASARC).

Collection Method

Compiled from a machine-readable version of the Exoplanet Orbit Database obtained from the authors' website, based on parameters reported in peer-reviewed literature.

Freshness

Updated within a day of source file changes; last recorded update was 2026-03-13.