Exoplanet · gas giant
HD 102843 b
HD 102843 b is a gas giant orbiting the star HD 102843. Its year lasts 3,090 Earth days. It was discovered in 2019 by the Radial Velocity method.
| Host star | HD 102843 |
|---|---|
| Distance | 204.7 light-years (62.8 pc) |
| Orbital period | 8.46 years |
| Orbital radius | 4.07 AU |
| Eccentricity | 0.110 |
| Radius | 13.1 R⊕ · 1.17 R♃ |
| Mass (minimum) | 114 M⊕ · 0.358 M♃ |
| Density | 0.278 g/cm³ |
| Equilibrium temperature | 127 K (-146 °C) |
| Stellar flux received | 0.0438 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2019 |
| Discovered by | Las Campanas Observatory |
Habitable zone
Beyond the habitable zone: it receives only %4.4 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.13° across: 0.24 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.26. Visible from the whole Southern Hemisphere and north to latitude 89° N. 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 1821. 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.