Exoplanet · Neptune-like planet
TOI-1338 b
TOI-1338 b is a Neptune-like planet orbiting the star TOI-1338 A. Its year lasts 95.4 Earth days. It was discovered in 2020 by the Transit method.
| Host star | TOI-1338 A |
|---|---|
| Distance | 1,301 light-years (399.0 pc) |
| Orbital period | 95.4 days |
| Orbital radius | 0.461 AU |
| Eccentricity | 0.033 |
| Radius | 7.66 R⊕ · 0.683 R♃ |
| Mass | 11.3 M⊕ · 0.0356 M♃ |
| Density | 0.56 g/cm³ |
| Surface gravity | 0.193 × Earth |
| Equilibrium temperature | 255 K (-18 °C) |
| Stellar flux received | 0.994 × Earth |
| Discovery method | Transit |
| Discovery year | 2020 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside its star's habitable zone: it receives enough light for liquid water to exist on its surface under a suitable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 1.5° across: 2.8 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 11.80. Visible from the whole Southern Hemisphere and north to latitude 30° N. South of latitude 30° S it never sets. It stands highest at midnight in December, the best time to observe it.
Light's journey
The light you see tonight set out around the year 725. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 23 million years.
Planets in the same system
- TOI-1338 c 216-day orbit · 10.3 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.