Exoplanet · mini-Neptune
HD 238090 b
HD 238090 b is a mini-Neptune orbiting the star HD 238090. Its year lasts 13.7 Earth days. It was discovered in 2020 by the Radial Velocity method.
| Host star | HD 238090 |
|---|---|
| Distance | 49.7 light-years (15.2 pc) |
| Orbital period | 13.7 days |
| Orbital radius | 0.0932 AU |
| Eccentricity | 0.300 |
| Radius | 2.52 R⊕ · 0.225 R♃ |
| Mass (minimum) | 6.89 M⊕ · 0.0217 M♃ |
| Density | 2.37 g/cm³ |
| Equilibrium temperature | 470 K (196 °C) |
| Stellar flux received | 8.1 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2020 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 8.1 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: 6.1 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.71. Visible from the whole Northern Hemisphere and south to latitude 36° S. North of latitude 36° N 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 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 881 thousand years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.