L 98-59 b is an exoplanet having a size between that of the Earth and Mars and a mass only half that of Venus.

[2] It orbits L 98-59, a red dwarf star 34.6 light-years away in the constellation Volans.

There are at least 3 (possibly 4) other planets in the system: L 98-59 c, d, e, and the unconfirmed L 98-59 f.[2] Its discovery was announced on 27 June 2019 in The Astronomical Journal[1] and in a NASA press release.

There are 4 confirmed planets in the system but they are not in the habitable zone of the host star.

[8] Transmission spectroscopy observations with the James Webb Space Telescope NIRSpec published in 2025 favor the presence of a sulfur dioxide atmosphere.