Exoplanet · gas giant
HIP 56640 b
HIP 56640 b is a gas giant orbiting the star HIP 56640. Its year lasts 2,680 Earth days. It was discovered in 2021 by the Radial Velocity method.
| Host star | HIP 56640 |
|---|---|
| Distance | 399.0 light-years (122.3 pc) |
| Orbital period | 7.33 years |
| Orbital radius | 4.55 AU |
| Eccentricity | 0.118 |
| Radius | 12.7 R⊕ · 1.13 R♃ |
| Mass | 2,150 M⊕ · 6.77 M♃ |
| Density | 5.77 g/cm³ |
| Surface gravity | 13.3 × Earth |
| Equilibrium temperature | 239 K (-34 °C) |
| Stellar flux received | 0.542 × Earth |
| Discovery method | Radial Velocity |
| Discovery year | 2021 |
| Discovered by | Multiple Observatories |
Habitable zone
Inside its star's habitable zone: it receives enough light for liquid water to exist on its surface under a suitable atmosphere.
Its star in the sky
In the planet's sky its star is a disc 0.58° across: 1.1 times the Sun as we see it from Earth.
In the sky
Too faint for the naked eye (magnitude 7.94); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 53° N. South of latitude 53° S it never sets. It stands highest at midnight in March, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1627. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.1 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.