Exoplanet · gas giant
ZTF J1230-2655 b
ZTF J1230-2655 b is a gas giant orbiting the star ZTF J1230-2655. Its year lasts 0.236 Earth days. It was discovered in 2025 by the Transit method.
| Host star | ZTF J1230-2655 |
|---|---|
| Distance | 608.9 light-years (186.7 pc) |
| Orbital period | 5.66 hours |
| Radius | 13.8 R⊕ · 1.23 R♃ |
| Mass | 7,020 M⊕ · 22.1 M♃ |
| Surface gravity | 37 × Earth |
| Equilibrium temperature | 2,950 K (2,677 °C) |
| Stellar flux received | 17,900 × Earth |
| Discovery method | Transit |
| Discovery year | 2025 |
| Discovered by | Zwicky Transient Facility |
Habitable zone
Inside the inner edge of the habitable zone: it receives 17,900 times the light the Earth does, too hot to keep liquid water on its surface.
In the sky
A telescope is needed to see it: its apparent magnitude is 18.91. 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 March, the best time to observe it.
Light's journey
The light you see tonight set out around the year 1417. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 11 million years.
Data: NASA Exoplanet Archive, PSCompPars. Its look in the simulation is a rendering based on the measured radius, mass and temperature.