TOI-2431 b
| Discovery | |
|---|---|
| Discovered by | Tas et al. (2025) |
| Discovery site | TESS |
| Discovery date | July 2025 |
| Transit | |
| Orbital characteristics | |
| 0.0063±0.0001 AU | |
| Eccentricity | 0 |
| 0.22419577(7) days | |
| Inclination | 74±1 |
| Physical characteristics | |
| 1.536±0.033 R🜨 | |
| Mass | 6.2±1.2 M🜨 |
Mean density | 9.4+1.9 −1.8 g/cm3 |
| Temperature | 2,063±30 K |
TOI-2431 b is an extrasolar planet orbiting the orange dwarf star TOI-2431. It was initially detected by the transit method in 2019, and with additional observations was confirmed in 2025. The planet is notable for its extremely short orbital period of 5h 22min, one of the shortest known. In about 31 million years, it will enter the Roche lobe of the host star and be torn apart.