Exoplanet · mini-Neptune
HIP 38594 b
HIP 38594 b is a mini-Neptune orbiting the star HIP 38594. Its year lasts 60.7 Earth days. It was discovered in 2020 by the Radial Velocity method.
| Host star | HIP 38594 |
|---|---|
| Distance | 58.0 light-years (17.8 pc) |
| Orbital period | 60.7 days |
| Orbital radius | 0.256 AU |
| Eccentricity | 0.170 |
| Radius | 2.77 R⊕ · 0.247 R♃ |
| Mass (minimum) | 8.1 M⊕ · 0.0255 M♃ |
| Density | 2.09 g/cm³ |
| Equilibrium temperature | 308 K (35 °C) |
| Stellar flux received | 1.32 × 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: 2.4 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.75. 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 1968. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
Planets in the same system
- HIP 38594 c 3,480-day orbit · 7.94 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.