Exoplanet · gas giant
CT Cha b
CT Cha b is a gas giant orbiting the star CT Cha. It was discovered in 2007 by the Imaging method.
| Host star | CT Cha |
|---|---|
| Distance | 622.1 light-years (190.7 pc) |
| Orbital radius | 440 AU |
| Radius | 24.7 R⊕ · 2.2 R♃ |
| Mass | 5,400 M⊕ · 17 M♃ |
| Density | 1.98 g/cm³ |
| Surface gravity | 8.88 × Earth |
| Equilibrium temperature | 2,600 K (2,327 °C) |
| Stellar flux received | 0 × Earth |
| Discovery method | Imaging |
| Discovery year | 2007 |
| Discovered by | Paranal Observatory |
Habitable zone
Beyond the habitable zone: it receives only %0 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.002° across: 0.0038 times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 12.34. Visible from the whole Southern Hemisphere and north to latitude 14° N. South of latitude 14° S it never sets.
Light's journey
The light you see tonight set out around the year 1404. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 11 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.