TOI-7189 b
TOI-7189 b is a hot Jupiter orbiting the M1 V star TOI-7189 in the constellation Ophiuchus. It lies about 627 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-7189 b?
TOI-7189 b has a radius of 10.90 times that of Earth, or 0.98 times the radius of Jupiter. Its mass is 159 times that of Earth, giving it a density of 0.67 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-7189 b in the Habitable Zone?
TOI-7189 b orbits inside the inner edge of the habitable zone of TOI-7189. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-7189: 0.208–0.532 AU (conservative: 0.263–0.504 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 ›
Temperature on TOI-7189 b
The equilibrium temperature of TOI-7189 b is about 738 K (465 °C) — hot enough to melt many metals. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 49.30 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-7189 b — one full orbit around TOI-7189 — lasts 2.89 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.033 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.06).
How Was TOI-7189 b Discovered?
TOI-7189 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-7189 b?
TOI-7189 b is 626.5 light-years (192.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1400. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 11,026,400 years to make the journey.
The Host Star: TOI-7189
TOI-7189
- Spectral type
- M1 V
- Surface temperature
- 3,775 K (Sun: 5,772 K)
- Mass
- 0.61 M☉
- Radius
- 0.59 R☉
- Luminosity
- 0.0650 L☉
Planetary System
TOI-7189 b is the only planet known to orbit TOI-7189 so far.
TOI-7189 b — Complete Data
| Radius | 10.900 Earth radii (0.980 Jupiter radii) |
|---|---|
| Mass | 159.04 Earth masses (0.500 Jupiter masses) |
| Density | 0.67 g/cm³ (Earth: 5.51) |
| Orbital period | 2.89 days |
| Orbital distance | 0.033 AU |
| Eccentricity | 0.060 |
| Equilibrium temperature | 738 K (465 °C) |
| Stellar irradiation | 49.30× Earth |
| Distance from Earth | 626.5 light-years (192.1 parsecs) |
| Constellation | Ophiuchus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-08-20. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-7189 b
Is TOI-7189 b habitable?
No — TOI-7189 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-7189 b?
TOI-7189 b is about 627 light-years from Earth in the constellation Ophiuchus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 11,026,400 years to get there.
How big is TOI-7189 b compared to Earth?
TOI-7189 b has 10.90 times the radius of Earth and about 159 times its mass.
How long is a year on TOI-7189 b?
One orbit around TOI-7189 takes 2.9 Earth days — short enough that 126 of its years would fit into one Earth year.
Explore TOI-7189 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.
