Exoplanet · Neptune-like planet
GJ 2056 b
GJ 2056 b is a Neptune-like planet orbiting the star GJ 2056. Its year lasts 70 Earth days. It was discovered in 2020 by the Radial Velocity method.
| Host star | GJ 2056 |
|---|---|
| Distance | 92.8 light-years (28.4 pc) |
| Orbital period | 70 days |
| Orbital radius | 0.283 AU |
| Eccentricity | 0.720 |
| Radius | 4.17 R⊕ · 0.372 R♃ |
| Mass (minimum) | 16.2 M⊕ · 0.051 M♃ |
| Density | 1.23 g/cm³ |
| Equilibrium temperature | 311 K (38 °C) |
| Stellar flux received | 1.55 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2020 |
| Discovered by | Multiple Observatories |
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 1.3° across: 2.5 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.37. Visible from the whole Southern Hemisphere and north to latitude 65° N. South of latitude 65° S 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 1933. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.