TOI-5177 b
TOI-5177 b is a super-Earth orbiting TOI-5177 in the constellation Leo. It lies about 505 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-5177 b?
TOI-5177 b has a radius of 1.93 times that of Earth.
Is TOI-5177 b in the Habitable Zone?
The position of TOI-5177 b relative to the habitable zone of TOI-5177 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-5177: 1.412–3.295 AU (conservative: 1.788–3.124 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-5177 b — one full orbit around TOI-5177 — lasts 2.21 Earth days, shorter than Mercury's 88-day year.
How Was TOI-5177 b Discovered?
TOI-5177 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-5177 b?
TOI-5177 b is 505.4 light-years (155.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1521. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 8,895,040 years to make the journey.
The Host Star: TOI-5177
TOI-5177
- Surface temperature
- 6,183 K (Sun: 5,772 K)
- Mass
- 1.18 M☉
- Radius
- 1.68 R☉
- Luminosity
- 3.7175 L☉
Planetary System
TOI-5177 b is the only planet known to orbit TOI-5177 so far.
TOI-5177 b — Complete Data
| Radius | 1.930 Earth radii (0.172 Jupiter radii) |
|---|---|
| Orbital period | 2.21 days |
| Distance from Earth | 505.4 light-years (155.0 parsecs) |
| Constellation | Leo |
| 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-5177 b
Is TOI-5177 b habitable?
TOI-5177 b is not known to orbit within the habitable zone of TOI-5177, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is TOI-5177 b?
TOI-5177 b is about 505 light-years from Earth in the constellation Leo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 8,895,040 years to get there.
How big is TOI-5177 b compared to Earth?
TOI-5177 b has 1.93 times the radius of Earth.
How long is a year on TOI-5177 b?
One orbit around TOI-5177 takes 2.2 Earth days — short enough that 165 of its years would fit into one Earth year.
Explore TOI-5177 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.
