Exoplanet · Earth-sized rocky planet
Gliese 12 b
Gliese 12 b is a Earth-sized rocky planet orbiting the star Gliese 12. Its year lasts 12.8 Earth days. It was discovered in 2024 by the Transit method.
| Host star | Gliese 12 |
|---|---|
| Distance | 39.8 light-years (12.2 pc) |
| Orbital period | 12.8 days |
| Orbital radius | 0.067 AU |
| Eccentricity | 0.240 |
| Radius | 0.93 R⊕ · 0.083 R♃ |
| Mass | 0.95 M⊕ · 0.00299 M♃ |
| Density | 6.4 g/cm³ |
| Surface gravity | 1.1 × Earth |
| Equilibrium temperature | 315 K (41 °C) |
| Stellar flux received | 1.62 × Earth |
| Discovery method | Transit |
| Discovery year | 2024 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
At the edge of the habitable zone (within the optimistic limits): liquid water would be possible only with a favourable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 2.1° across: 4 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.58. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° N it never sets. It stands highest at midnight in September, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1986. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 706 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.