ZTF J1230-2655 is 609 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 10,000 K star; the first was found in 2025 by transit (Zwicky Transient Facility).
Fly there in 3DZTF J1230-2655 b goes round its star every 5.7 hours, 373 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Surface temperature | 10,000 K |
| Mass | 0.646 solar masses |
| Radius | 0.0123 solar radii |
| Luminosity | 0.00138 times the Sun |
| Apparent magnitude | 18.9116 |
| Distance from the Sun | 608.9 light-years (186.7 parsecs) |
| Position (J2000) | RA 187.5689°, Dec -26.9310° |
| Constellation | Hydra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| ZTF J1230-2655 b | 5.7 hours | 0.0065 AU from Kepler’s law | 13.787 R⊕ | 7024 M⊕ | Transit, 2025 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.