Kepler Objects of Interest (KOI): Catalog of Potential Exoplanets

Launched in 2009, the Kepler Mission surveyed a region of our galaxy to determine the fraction of stars with planets. The Kepler Objects of Interest (KOI) catalog lists observed targets flagged as potentially having exoplanets, though they may be false positives. This catalog is produced by the Kepler project and brought to MAST via NExScI by the National Aeronautics and Space Administration.

Use Cases

• Identify candidate exoplanets based on observed transit signals flagged in the catalog.
• Analyze the size distribution of potential planets based on Kepler mission observations.
• Study false positive rates in exoplanet detection by comparing KOI flags with confirmed planet data.
• Train machine learning models to classify transit signals as planets or other astrophysical phenomena.

Strengths

• Data originates from the NASA Kepler Mission, a dedicated space telescope for exoplanet discovery.
• Catalog is actively maintained, with a last update recorded on 2026-03 13.
• Focuses on a specific scientific goal: measuring the fraction of stars with planets.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale analysis.
• The description notes entries may be false positives caused by other types of transient detection.

Provenance

Source

National Aeronautics and Space Administration (NASA), Kepler project

Collection Method

Observational data from the Kepler space telescope, processed and flagged by the project.

Time Range

Observations began in 2009; the primary mission concluded in 2013, with continued K2 mission observations.

Freshness

Last updated 2026-03-13 18:21:13.433833

Geography

Surveys a region of our galaxy; specific spatial coverage is not detailed in the provided description.