Exoplanet · Neptune-like planet
TIC 139270665 b
TIC 139270665 b is a Neptune-like planet orbiting the star TIC 139270665. Its year lasts 23.6 Earth days. It was discovered in 2024 by the Transit method.
| Host star | TIC 139270665 |
|---|---|
| Distance | 619.3 light-years (189.9 pc) |
| Orbital period | 23.6 days |
| Orbital radius | 0.163 AU |
| Eccentricity | 0.105 |
| Radius | 7.23 R⊕ · 0.645 R♃ |
| Mass | 147 M⊕ · 0.463 M♃ |
| Density | 2.13 g/cm³ |
| Surface gravity | 2.82 × Earth |
| Equilibrium temperature | 703 K (430 °C) |
| Stellar flux received | 40.3 × Earth |
| Discovery method | Transit |
| Discovery year | 2024 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside the inner edge of the habitable zone: it receives 40.3 times the light the Earth does, too hot to keep liquid water on its surface.
Its star in the sky
In the planet's sky its star is a disc 3.3° across: 6.2 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.45. Visible from the whole Northern Hemisphere and south to latitude 57° S. North of latitude 57° N it never sets. It stands highest at midnight in January, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1407. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 11 million years.
Planets in the same system
- TIC 139270665 c 1,010-day orbit · 12.9 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.