Exoplanet · mini-Neptune
HD 3167 d
HD 3167 d is a mini-Neptune orbiting the star HD 3167. Its year lasts 8.4 Earth days. It was discovered in 2017 by the Radial Velocity method.
| Host star | HD 3167 |
|---|---|
| Distance | 154.2 light-years (47.3 pc) |
| Orbital period | 8.4 days |
| Orbital radius | 0.077 AU |
| Eccentricity | 0.350 |
| Radius | 2.61 R⊕ · 0.233 R♃ |
| Mass | 7.3 M⊕ · 0.023 M♃ |
| Density | 2.26 g/cm³ |
| Surface gravity | 1.07 × Earth |
| Equilibrium temperature | 865 K (592 °C) |
| Stellar flux received | 88.9 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2017 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside the inner edge of the habitable zone: it receives 88.9 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 6° across: 11 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.97); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 86° S. 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 1872. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.7 million years.
Planets in the same system
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.