Exoplanet · gas giant
ZTF J1828+2308 b
ZTF J1828+2308 b is a gas giant orbiting the star ZTF J1828+2308. Its year lasts 0.112 Earth days. It was discovered in 2025 by the Transit method.
| Host star | ZTF J1828+2308 |
|---|---|
| Distance | 658.3 light-years (201.8 pc) |
| Orbital period | 2.69 hours |
| Radius | 11.1 R⊕ · 0.993 R♃ |
| Mass | 6,360 M⊕ · 20 M♃ |
| Density | 25.3 g/cm³ |
| Surface gravity | 51.3 × Earth |
| Discovery method | Transit |
| Discovery year | 2025 |
| Discovered by | Zwicky Transient Facility |
In the sky
A telescope is needed to see it: its apparent magnitude is 18.04. Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N it never sets. It stands highest at midnight in June, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1368. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.