Exoplanet · gas giant
GJ 900 b
GJ 900 b is a gas giant orbiting the star GJ 900 A. It was discovered in 2024 by the Imaging method.
| Host star | GJ 900 A |
|---|---|
| Distance | 67.9 light-years (20.8 pc) |
| Orbital radius | 12,000 AU |
| Radius | 12.4 R⊕ · 1.11 R♃ |
| Mass | 3,500 M⊕ · 11 M♃ |
| Density | 10.1 g/cm³ |
| Surface gravity | 22.7 × Earth |
| Equilibrium temperature | 1 K (-272 °C) |
| Stellar flux received | 0 × Earth |
| Discovery method | Imaging |
| Discovery year | 2024 |
| Discovered by | Multiple Observatories |
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 3.2 × 10⁻⁵° across: 6.0 × 10⁻⁵ times the Sun as we see it from Earth.
In the sky
A telescope is needed to see it: its apparent magnitude is 9.59. Visible from the whole Northern Hemisphere and south to latitude 88° S. It stands highest at midnight in September, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1958. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.