Exoplanet · gas giant
HD 240237 b
HD 240237 b is a gas giant orbiting the star HD 240237. Its year lasts 746 Earth days. It was discovered in 2011 by the Radial Velocity method.
| Host star | HD 240237 |
|---|---|
| Distance | 3,044 light-years (933.4 pc) |
| Orbital period | 2.04 years |
| Orbital radius | 1.92 AU |
| Eccentricity | 0.400 |
| Radius | 12.2 R⊕ · 1.09 R♃ |
| Mass (minimum) | 5,050 M⊕ · 15.9 M♃ |
| Density | 15.3 g/cm³ |
| Equilibrium temperature | 1,153 K (880 °C) |
| Stellar flux received | 83.8 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2011 |
| Discovered by | McDonald Observatory |
Habitable zone
Inside the inner edge of the habitable zone: it receives 83.8 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 20° across: 37 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 8.38); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 32° S. North of latitude 32° 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 1019 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 54 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.