Exoplanet · mini-Neptune
GJ 433 d
GJ 433 d is a mini-Neptune orbiting the star GJ 433. Its year lasts 36.1 Earth days. It was discovered in 2020 by the Radial Velocity method.
| Host star | GJ 433 |
|---|---|
| Distance | 29.6 light-years (9.06 pc) |
| Orbital period | 36.1 days |
| Orbital radius | 0.178 AU |
| Eccentricity | 0.070 |
| Radius | 2.14 R⊕ · 0.191 R♃ |
| Mass (minimum) | 5.22 M⊕ · 0.0164 M♃ |
| Density | 2.93 g/cm³ |
| Equilibrium temperature | 280 K (7 °C) |
| Stellar flux received | 0.631 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2020 |
| Discovered by | Multiple Facilities |
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 9.81. Visible from the whole Southern Hemisphere and north to latitude 57° N. South of latitude 57° S it never sets. It stands highest at midnight in March, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1996. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 524 thousand years.
Planets in the same system
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.