Exoplanet · mini-Neptune
HD 219134 g
HD 219134 g is a mini-Neptune orbiting the star HD 219134. Its year lasts 94.2 Earth days. It was discovered in 2015 by the Radial Velocity method.
| Host star | HD 219134 |
|---|---|
| Distance | 21.3 light-years (6.53 pc) |
| Orbital period | 94.2 days |
| Orbital radius | 0.375 AU |
| Eccentricity | 0.000 |
| Radius | 3.28 R⊕ · 0.293 R♃ |
| Mass (minimum) | 10.8 M⊕ · 0.034 M♃ |
| Density | 1.68 g/cm³ |
| Equilibrium temperature | 339 K (66 °C) |
| Stellar flux received | 2.2 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2015 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 2.2 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 1.1° across: 2.1 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.57). Visible from the whole Northern Hemisphere and south to latitude 33° S. North of latitude 33° N it never sets. 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 2005. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 378 thousand years.
Planets in the same system
- HD 219134 b 3.09-day orbit · 1.6 R⊕
- HD 219134 c 6.76-day orbit · 1.51 R⊕
- HD 219134 f 22.7-day orbit · 1.31 R⊕
- HD 219134 d 46.9-day orbit · 1.61 R⊕
- HD 219134 h 2,250-day orbit · 12.7 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.