Exoplanet · mini-Neptune
HIP 116454 b
HIP 116454 b is a mini-Neptune orbiting the star HIP 116454. Its year lasts 9.1 Earth days. It was discovered in 2014 by the Transit method.
| Host star | HIP 116454 |
|---|---|
| Distance | 203.7 light-years (62.4 pc) |
| Orbital period | 9.1 days |
| Orbital radius | 0.0792 AU |
| Eccentricity | 0.215 |
| Radius | 2.47 R⊕ · 0.22 R♃ |
| Mass | 9.7 M⊕ · 0.0305 M♃ |
| Density | 3.53 g/cm³ |
| Surface gravity | 1.59 × Earth |
| Equilibrium temperature | 753 K (480 °C) |
| Stellar flux received | 51.3 × Earth |
| Discovery method | Transit |
| Discovery year | 2014 |
| Discovered by | K2 |
Habitable zone
Inside the inner edge of the habitable zone: it receives 51.3 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 5.1° across: 9.6 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 10.19. Visible from the whole Southern Hemisphere and north to latitude 90° N. 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 1822. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.6 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.