Exoplanet · gas giant
HD 111998 b
HD 111998 b is a gas giant orbiting the star HD 111998. Its year lasts 810 Earth days. It was discovered in 2016 by the Radial Velocity method.
| Host star | HD 111998 |
|---|---|
| Distance | 108.4 light-years (33.2 pc) |
| Orbital period | 2.22 years |
| Orbital radius | 1.91 AU |
| Eccentricity | 0.130 |
| Radius | 12.9 R⊕ · 1.15 R♃ |
| Mass | 1,530 M⊕ · 4.8 M♃ |
| Density | 3.91 g/cm³ |
| Surface gravity | 9.17 × Earth |
| Equilibrium temperature | 275 K (2 °C) |
| Stellar flux received | 0.892 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2016 |
| Discovered by | La Silla Observatory |
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 0.4° across: 0.76 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.11). Visible from the whole Southern Hemisphere and north to latitude 86° N. It stands highest at midnight in April, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1918. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.9 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.