Exoplanet · super-Earth
HD 20329 b
HD 20329 b is a super-Earth orbiting the star HD 20329. Its year lasts 0.926 Earth days. It was discovered in 2022 by the Transit method.
| Host star | HD 20329 |
|---|---|
| Distance | 207.7 light-years (63.7 pc) |
| Orbital period | 22.2 hours |
| Orbital radius | 0.018 AU |
| Eccentricity | 0.000 |
| Radius | 1.72 R⊕ · 0.153 R♃ |
| Mass | 7.42 M⊕ · 0.0233 M♃ |
| Density | 8.06 g/cm³ |
| Surface gravity | 2.51 × Earth |
| Equilibrium temperature | 2,141 K (1,868 °C) |
| Stellar flux received | 3,470 × 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 3,470 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 33° across: 61 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.76); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in November, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1818. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.7 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.