Confirmed exoplanet · Database record + computed analysis
ZTF J1828+2308 b
A confirmed world orbiting ZTF J1828+2308, 658.3 light-years away.
A gas giant
11.13 Earth radii, Jupiter-class (Jupiter is 11.2). With 6356.6 Earth masses packed into that size, its density points to rock and iron rather than gas. Orbiting this close, it is a classic 'hot Jupiter', a giant that migrated inward from where it formed.
The orbit
Its year lasts about 2.7 hours, making it an ultra-short-period planet skimming its star.
Its sun
Its star is hotter than the Sun (15,900 K), burning brighter and faster.
How far is that, really?
At 658 light-years, tonight's light from this system left it around the year 1367. A Voyager-speed probe would need roughly 11,646,532 years to get there.
How we found it
It was found by the transit method: the planet crosses its star's face on schedule, dimming it by a tiny, repeating fraction. The dip's depth gives the planet's size. The discovery was announced in 2025 from Zwicky Transient Facility.
Everything above is computed from the archive’s measured values for this planet. Where a quantity is missing, the statement is omitted rather than guessed.
About this record
The measured values come from the NASA Exoplanet Archive, and any missing value has not been determined yet; the Atlas never fills gaps with guesses. More standout worlds: Proxima b, TRAPPIST-1e, K2-18 b, 55 Cancri e, and the detection methods that found them all.