TOI-1794 b
TOI-1794 b is a puffy low-density planet orbiting TOI-1794 in the constellation Canes Venatici. It lies about 508 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-1794 b?
TOI-1794 b has a radius of 3.30 times that of Earth. Its mass is 8.7 times that of Earth, giving it a density of 1.31 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-1794 b in the Habitable Zone?
TOI-1794 b orbits inside the inner edge of the habitable zone of TOI-1794. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1794: 0.950–2.248 AU (conservative: 1.203–2.131 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-1794 b
The equilibrium temperature of TOI-1794 b is about 993 K (720 °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.
Orbit and Year Length
A year on TOI-1794 b — one full orbit around TOI-1794 — lasts 8.77 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.082 AU — closer to its star than Mercury is to the Sun.
How Was TOI-1794 b Discovered?
TOI-1794 b was discovered in 2024 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-1794 b?
TOI-1794 b is 508.1 light-years (155.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1518. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 8,942,560 years to make the journey.
The Host Star: TOI-1794
TOI-1794
- Surface temperature
- 5,631 K (Sun: 5,772 K)
- Mass
- 0.97 M☉
- Radius
- 1.32 R☉
- Luminosity
- 1.5750 L☉
- Age
- 10.8 billion years (Sun: 4.6)
Planetary System
TOI-1794 b is the only planet known to orbit TOI-1794 so far.
TOI-1794 b — Complete Data
| Radius | 3.297 Earth radii (0.294 Jupiter radii) |
|---|---|
| Mass | 8.70 Earth masses (0.027 Jupiter masses) |
| Density | 1.31 g/cm³ (Earth: 5.51) |
| Orbital period | 8.77 days |
| Orbital distance | 0.082 AU |
| Equilibrium temperature | 993 K (720 °C) |
| Distance from Earth | 508.1 light-years (155.8 parsecs) |
| Constellation | Canes Venatici |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-07-22. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1794 b
Is TOI-1794 b habitable?
No — TOI-1794 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1794 b?
TOI-1794 b is about 508 light-years from Earth in the constellation Canes Venatici. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 8,942,560 years to get there.
How big is TOI-1794 b compared to Earth?
TOI-1794 b has 3.30 times the radius of Earth and about 8.7 times its mass.
How long is a year on TOI-1794 b?
One orbit around TOI-1794 takes 8.8 Earth days — short enough that 42 of its years would fit into one Earth year.
Explore TOI-1794 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.
