Exoplanet · mini-Neptune
HD 109833 b
HD 109833 b is a mini-Neptune orbiting the star HD 109833. Its year lasts 9.19 Earth days. It was discovered in 2022 by the Transit method.
| Host star | HD 109833 |
|---|---|
| Distance | 259.5 light-years (79.6 pc) |
| Orbital period | 9.19 days |
| Eccentricity | 0.180 |
| Radius | 2.89 R⊕ · 0.258 R♃ |
| Mass | 8.69 M⊕ · 0.0273 M♃ (estimated from the radius) |
| Density | 1.98 g/cm³ |
| Equilibrium temperature | 786 K (513 °C) |
| Stellar flux received | 63.5 × Earth |
| Discovery method | Transit |
| Discovery year | 2022 |
| Discovered by | Transiting Exoplanet Survey Satellite (TESS) |
Habitable zone
Inside the inner edge of the habitable zone: it receives 63.5 times the light the Earth does, too hot to keep liquid water on its surface.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.29. Visible from the whole Southern Hemisphere and north to latitude 15° N. South of latitude 15° S 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 1767. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
Planets in the same system
- HD 109833 c 13.9-day orbit · 2.59 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.