In 2009, a
hot Jupiter planet candidate (KOI-4.01, now known as Kepler-1658b) was identified around Kepler-1658 by the
Kepler space telescope via the
transit method. Initially ruled out as a false alarm, a 2019 study re-claimed its nature as a planet. This would be the first planet ever detected by Kepler. Analysis of the
Transiting Exoplanet Survey Satellite (TESS) data in 2022 showed that it is gradually spiraling into its star, with its orbit decaying. However, in 2025 it was demonstrated that Kepler-1658b is a
false positive planet. In reality, all the data that supported the detection of a planet with physical orbital decay were caused by the eclipsing outer system, whose
light travel time effect is responsible for the supposed orbital decay. == References ==