[6] Periodic variations in the timing of this system's eclipses were detected in 2015 using data from the Kepler space telescope.
It was proposed that these variations are caused by the gravitational effects of a Jupiter-mass planet, Kepler-451b, orbiting with a period of 416 days at a distance of 0.92 AU.
An independent study in 2020 found no evidence for Kepler-451b, ruling out the presence of any object of at least Jupiter's mass on the claimed orbit with an inclination greater than 43°.
[3] A 2022 study instead proposed a three-planet model, including the originally claimed planet as well as two other planets of similar mass with orbital periods of 43 and 1,800 days.
[6] In general, eclipse timing variations of this type are common in post-common envelope binary systems, and their true cause remains uncertain.