.png) TOI-4138 b compared to Jupiter | |
| Discovery[1] | |
|---|---|
| Discovered by | Montalto et al. |
| Discovery site | TESS |
| Discovery date | 13 October 2021 |
| Transit | |
| Orbital characteristics[1] | |
| Periastron | 0.049 AU (7,300,000 km) |
| Apoastron | 0.052 AU (7,800,000 km) |
| 0.051 ± 0.002 AU (7,630,000 ± 300,000 km) | |
| Eccentricity | 0.03 ± 0.02 |
| 3.660028 ± 0.000006 d | |
| Inclination | 86.0°±0.7° |
| 2,458,708.9983 ± 0.0003 JD | |
| Semi-amplitude | 74±3 m/s |
| Star | TOI-4138 |
| Physical characteristics[1] | |
| 1.49 ± 0.04 RJ | |
| Mass | 0.67 ± 0.03 MJ |
Mean density | 0.250 ± 0.020 g/cm3[citation needed] |
| Temperature | 1,762 ± 21 K (2,711.9 ± 37.8 °F; 1,488.8 ± 21.0 °C) |
TOI-4138 b is a transiting exoplanet orbiting the G-type subgiant TOI-4138 1,674 light years away in the northern circumpolar constellation Ursa Minor.