Exoplanet · Neptune-like planet
HD 69830 d
HD 69830 d is a Neptune-like planet orbiting the star HD 69830. Its year lasts 197 Earth days. It was discovered in 2006 by the Radial Velocity method.
| Host star | HD 69830 |
|---|---|
| Distance | 41.0 light-years (12.6 pc) |
| Orbital period | 197 days |
| Orbital radius | 0.63 AU |
| Eccentricity | 0.070 |
| Radius | 4.45 R⊕ · 0.397 R♃ |
| Mass (minimum) | 18.1 M⊕ · 0.057 M♃ |
| Density | 1.13 g/cm³ |
| Equilibrium temperature | 308 K (35 °C) |
| Stellar flux received | 1.52 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2006 |
| Discovered by | La Silla Observatory |
Habitable zone
At the edge of the habitable zone (within the optimistic limits): liquid water would be possible only with a favourable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 0.75° across: 1.4 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.95). Visible from the whole Southern Hemisphere and north to latitude 77° N. South of latitude 77° S it never sets. It stands highest at midnight in January, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1985. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 727 thousand years.
Planets in the same system
- HD 69830 b 8.67-day orbit · 3.17 R⊕
- HD 69830 c 31.6-day orbit · 3.46 R⊕
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.