Exoplanet · gas giant
AT2021ueyL b
AT2021ueyL b is a gas giant orbiting the star AT2021ueyL. Its year lasts 4,170 Earth days. It was discovered in 2025 by the Microlensing method.
| Host star | AT2021ueyL |
|---|---|
| Distance | 3,392 light-years (1,040 pc) |
| Orbital period | 11.4 years |
| Orbital radius | 4.01 AU |
| Radius | 13.6 R⊕ · 1.21 R♃ |
| Mass | 426 M⊕ · 1.34 M♃ |
| Density | 0.93 g/cm³ |
| Surface gravity | 2.3 × Earth |
| Discovery method | Microlensing |
| Discovery year | 2025 |
| Discovered by | Multiple Observatories |
In the sky
A telescope is needed to see it: its apparent magnitude is 19.68. Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° N it never sets. It stands highest at midnight in August, the best time to observe it.
Light's journey
The light you see tonight set out around 1367 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 60 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.