Editing Proxima Centauri (section)

===Planet d===
{{main|Proxima Centauri d}}

In 2019, a team of astronomers revisited the data from [[ESPRESSO]] about Proxima Centauri&nbsp;b to refine its mass. While doing so, the team found another radial velocity spike with a periodicity of 5.15&nbsp;days. They estimated that if it were a planetary companion, it would be no less than 0.29&nbsp;Earth masses.<ref name="Suárez MascareñoFaria2020"/> Further analysis confirmed the signal's existence leading up to the announcement of the candidate planet in February&nbsp;2022.<ref name="FariaSuárezMascareñoSilva2022"/>