Hot Jupiter TOI-2535 b
Located roughly 1,000 light-years away in the constellation Corvus, the hot Jupiter TOI-2535 b has stopped crossing in front of its host star due to an orbital tilt triggered by a nearby planet with a mass at least as large as Saturn. Observations made by the TESS telescope between 2019 and 2026 revealed that the planet’s transits have ceased, with the next expected transit not occurring for another 30 to 50 years.
TOI-2535 b completes an orbit around its star every 8.25 days. However, over time, its transits became shorter and less pronounced, eventually disappearing altogether in 2026. During the observation period, the planet’s transit times varied by as much as six hours ahead or behind schedule, indicating significant fluctuations in its orbit.
Influence of a Nearby Massive Planet
The orbit of TOI-2535 b is being tilted by the gravitational pull of a neighboring planet, whose mass is estimated to be at least that of Saturn. This interaction causes rapid orbital shifts, with TOI-2535 b exhibiting the fastest known orbital precession among planets orbiting single stars. The next transit is predicted to occur between 2056 and 2076. These findings were supported by observations from the 3.5-meter WIYN telescope at Kitt Peak Observatory in Arizona.
The presence of the neighboring planet was inferred through calculations rather than direct observation. Studies suggest that between 40% and 70% of hot Jupiters end up spiraling into their stars after migrating along highly elongated orbits. TOI-2535 b likely approached its star gradually in a spiraling inward path.
"This is the most extreme case we've seen because these two planets are interacting very strongly." — Samuel Yi
This discovery highlights the complex gravitational dynamics within planetary systems, especially concerning hot Jupiters that can be heavily influenced by neighboring bodies. Understanding systems like TOI-2535 b offers astronomers valuable insights into planetary evolution, orbital behavior, and potential formation scenarios beyond our Solar System. Continued monitoring of this system promises to reveal more about the forces shaping planetary orbits in distant star systems.
The intricate dynamics of exoplanets continue to reveal fascinating insights into their behaviors and interactions. For instance, recent findings from the James Webb Telescope have shed light on the dense atmosphere of exoplanet TOI-561 b and the intriguing characteristics of interstellar comet 3I/ATLAS. Such discoveries underscore the importance of understanding gravitational influences on planetary systems, much like the case of TOI-2535 b and its neighboring giant planet.