Exoplanet · gas giant
HD 142 c
HD 142 c is a gas giant orbiting the star HD 142. Its year lasts 10,200 Earth days. It was discovered in 2012 by the Radial Velocity method.
| Host star | HD 142 |
|---|---|
| Distance | 85.4 light-years (26.2 pc) |
| Orbital period | 27.8 years |
| Orbital radius | 9.81 AU |
| Eccentricity | 0.277 |
| Radius | 12.4 R⊕ · 1.11 R♃ |
| Mass | 3,460 M⊕ · 10.9 M♃ |
| Density | 9.99 g/cm³ |
| Surface gravity | 22.5 × Earth |
| Equilibrium temperature | 117 K (-157 °C) |
| Stellar flux received | 0.031 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2012 |
| Discovered by | Anglo-Australian Telescope |
Habitable zone
Beyond the habitable zone: it receives only %3.1 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.08° across: 0.15 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.70). Visible from the whole Southern Hemisphere and north to latitude 41° N. South of latitude 41° S 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 1941. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.5 million years.
Planets in the same system
- HD 142 A d 108-day orbit · 10.9 R⊕
- HD 142 b 351-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.