TOI-4329 b
TOI-4329 b is a hot Jupiter orbiting TOI-4329 in the constellation Cepheus. It lies about 2,339 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-4329 b?
TOI-4329 b has a radius of 16.81 times that of Earth, or 1.50 times the radius of Jupiter. Its mass is 143 times that of Earth.
Is TOI-4329 b in the Habitable Zone?
The position of TOI-4329 b relative to the habitable zone of TOI-4329 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-4329: 1.844–4.321 AU (conservative: 2.336–4.097 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on TOI-4329 b — one full orbit around TOI-4329 — lasts 2.92 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.07).
How Was TOI-4329 b Discovered?
TOI-4329 b was discovered in 2022 using the transit method, with observations from Transiting Exoplanet Survey Satellite (TESS).
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is TOI-4329 b?
TOI-4329 b is 2,339.0 light-years (717.1 parsecs) from Earth. Light arriving here tonight left the planet about 2,339 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 41,166,400 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. TOI-4329 b scores 0.05, ranking #5,233 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-4329
TOI-4329
- Surface temperature
- 6,000 K (Sun: 5,772 K)
- Mass
- 1.54 M☉
- Radius
- 2.31 R☉
- Age
- 2.4 billion years (Sun: 4.6)
Planetary System
TOI-4329 b is the only planet known to orbit TOI-4329 so far.
TOI-4329 b — Complete Data
| Radius | 16.813 Earth radii (1.500 Jupiter radii) |
|---|---|
| Mass | 143.02 Earth masses (0.450 Jupiter masses) |
| Orbital period | 2.92 days |
| Eccentricity | 0.068 |
| Earth Similarity Index | 0.05 |
| Distance from Earth | 2,339.0 light-years (717.1 parsecs) |
| Constellation | Cepheus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-03-16. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4329 b
Is TOI-4329 b habitable?
TOI-4329 b is not known to orbit within the habitable zone of TOI-4329, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is TOI-4329 b?
TOI-4329 b is about 2,339 light-years from Earth in the constellation Cepheus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 41,166,400 years to get there.
How big is TOI-4329 b compared to Earth?
TOI-4329 b has 16.81 times the radius of Earth and about 143 times its mass.
How long is a year on TOI-4329 b?
One orbit around TOI-4329 takes 2.9 Earth days — short enough that 125 of its years would fit into one Earth year.
Explore TOI-4329 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
