TOI-797 b
TOI-797 b is a terrestrial planet orbiting TOI-797 in the constellation Volans. It lies about 183 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-797 b?
TOI-797 b has a radius of 1.21 times that of Earth.
Is TOI-797 b in the Habitable Zone?
The position of TOI-797 b relative to the habitable zone of TOI-797 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-797: 0.151–0.390 AU (conservative: 0.191–0.370 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-797 b — one full orbit around TOI-797 — lasts just 43.2 hours, shorter than Mercury's 88-day year.
How Was TOI-797 b Discovered?
TOI-797 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-797 b?
TOI-797 b is 183.3 light-years (56.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1843. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,226,080 years to make the journey.
The Host Star: TOI-797
TOI-797
- Surface temperature
- 3,607 K (Sun: 5,772 K)
- Mass
- 0.47 M☉
- Radius
- 0.47 R☉
- Luminosity
- 0.0342 L☉
Planetary System
TOI-797 b is the only planet known to orbit TOI-797 so far.
TOI-797 b — Complete Data
| Radius | 1.210 Earth radii (0.108 Jupiter radii) |
|---|---|
| Orbital period | 1.80 days |
| Distance from Earth | 183.3 light-years (56.2 parsecs) |
| Constellation | Volans |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-10-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-797 b
Is TOI-797 b habitable?
TOI-797 b is not known to orbit within the habitable zone of TOI-797, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is TOI-797 b?
TOI-797 b is about 183 light-years from Earth in the constellation Volans. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,226,080 years to get there.
How big is TOI-797 b compared to Earth?
TOI-797 b has 1.21 times the radius of Earth.
How long is a year on TOI-797 b?
One orbit around TOI-797 takes 1.8 Earth days — short enough that 203 of its years would fit into one Earth year.
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