Exoplanet · gas giant
HIP 77900 b
HIP 77900 b is a gas giant orbiting the star HIP 77900. It was discovered in 2024 by the Imaging method.
| Host star | HIP 77900 |
|---|---|
| Distance | 492.1 light-years (150.9 pc) |
| Orbital radius | 3,320 AU |
| Radius | 12.1 R⊕ · 1.08 R♃ |
| Mass | 6,670 M⊕ · 21 M♃ |
| Density | 20.7 g/cm³ |
| Surface gravity | 45.6 × Earth |
| Equilibrium temperature | 2,507 K (2,234 °C) |
| Discovery method | Imaging |
| Discovery year | 2024 |
| Discovered by | European Space Agency (ESA) Gaia Satellite |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.15). Visible from the whole Southern Hemisphere and north to latitude 63° N. South of latitude 63° S it never sets. It stands highest at midnight in May, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1534. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 8.7 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.