List of smallest exoplanets

Below is a list of the smallest exoplanets so far discovered, in terms of physical size, ordered by radius.

List

The sizes are listed in units of Earth radii (R_🜨). All planets listed are smaller than Earth and Venus, up to 0.7 Earth radii. The NASA Exoplanet Archive is used as the main data source.

Excluded objects

Kepler-37e is listed with a radius of 0.37±0.18 R_🜨 in the Exoplanet Archive based on KOI data, but the existence of this planet is doubtful, and assuming its existence, a 2023 study found a mass of 8.1±1.7 M_🜨, inconsistent with such a small radius.

KOI-6705.01, listed as a potential very small planet in the KOI dataset, was shown to be a false positive in 2016.

Kepler and TESS candidates

Below shows a list of Kepler and TESS candidates below 0.7 R_🜨 that have yet to be confirmed.

See also

• List of largest exoplanets
• List of exoplanet extremes
• Lists of exoplanets

References