TOI-2180 b
TOI-2180 b is a giant exoplanet orbiting the G-type star TOI-2180, also known as HD 238894. It was discovered with the help of the Transiting Exoplanet Survey Satellite and is currently the exoplanet with the longest orbital period TESS was able to uncover (as of September 2022). TOI-2180 b orbits its host star every 260.16 days.
illustration of TOI-2180 b | |
| Discovery | |
|---|---|
| Discovered by | The TESS-Keck Survey |
| Discovery date | February 2022 |
| Transit Method | |
| Designations | |
| HD 238894 b | |
| Orbital characteristics | |
| 0.828±0.012 au | |
| Eccentricity | 0.3683 ± 0.0073 |
| 260.15764 ± 0.00045 days | |
| Inclination | 89.955+0.032 −0.044 |
| Star | HD 238894 |
| Physical characteristics | |
Mean radius | 1.010+0.022 −0.019 RJ |
| Mass | 2.755+0.087 −0.081 MJ |
| 3.827+0.012 −0.015 dex | |
| Temperature | 348.0+3.3 −3.6 K |
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