TOI-4029 b
TOI-4029 b is a hot Jupiter orbiting TOI-4029 in the constellation Serpens. It lies about 895 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4029 b?
TOI-4029 b has a radius of 6.74 times that of Earth, or 0.60 times the radius of Jupiter.
Is TOI-4029 b in the Habitable Zone?
The position of TOI-4029 b relative to the habitable zone of TOI-4029 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-4029: 0.855–2.021 AU (conservative: 1.083–1.916 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-4029 b — one full orbit around TOI-4029 — lasts 5.88 Earth days, shorter than Mercury's 88-day year.
How Was TOI-4029 b Discovered?
TOI-4029 b was discovered in 2026 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-4029 b?
TOI-4029 b is 895.1 light-years (274.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1131. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 15,753,760 years to make the journey.
The Host Star: TOI-4029
TOI-4029
- Surface temperature
- 5,663 K (Sun: 5,772 K)
- Radius
- 1.18 R☉
Planetary System
TOI-4029 b is the only planet known to orbit TOI-4029 so far.
TOI-4029 b — Complete Data
| Radius | 6.738 Earth radii (0.601 Jupiter radii) |
|---|---|
| Orbital period | 5.88 days |
| Distance from Earth | 895.1 light-years (274.4 parsecs) |
| Constellation | Serpens |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-04-23. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4029 b
Is TOI-4029 b habitable?
TOI-4029 b is not known to orbit within the habitable zone of TOI-4029, and as a hot Jupiter it is an unlikely candidate for life as we know it.
How far away is TOI-4029 b?
TOI-4029 b is about 895 light-years from Earth in the constellation Serpens. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 15,753,760 years to get there.
How big is TOI-4029 b compared to Earth?
TOI-4029 b has 6.74 times the radius of Earth.
How long is a year on TOI-4029 b?
One orbit around TOI-4029 takes 5.9 Earth days — short enough that 62 of its years would fit into one Earth year.
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