Exoplanet · gas giant
HIP 21152 b
HIP 21152 b is a gas giant orbiting the star HIP 21152. Its year lasts 22,000 Earth days. It was discovered in 2022 by the Imaging method.
| Host star | HIP 21152 |
|---|---|
| Distance | 141.6 light-years (43.4 pc) |
| Orbital period | 60.2 years |
| Orbital radius | 17 AU |
| Eccentricity | 0.360 |
| Radius | 12 R⊕ · 1.07 R♃ |
| Mass | 7,630 M⊕ · 24 M♃ |
| Density | 24.3 g/cm³ |
| Surface gravity | 53 × Earth |
| Equilibrium temperature | 1,300 K (1,027 °C) |
| Stellar flux received | 0.015 × Earth |
| Discovery method | Imaging |
| Discovery year | 2022 |
| Discovered by | Multiple Observatories |
Habitable zone
Beyond the habitable zone: it receives only %1.5 of the light the Earth does, a frozen world.
Its star in the sky
In the planet's sky its star is a disc 0.05° across: 0.094 times the Sun as we see it from Earth.
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.37). Visible from the whole Northern Hemisphere and south to latitude 85° S. It stands highest at midnight in November, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1884. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.