TOI-2274 b
TOI-2274 b is a mini-Neptune orbiting the M star TOI-2274 in the constellation Lyra. It lies about 159 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-2274 b?
TOI-2274 b has a radius of 2.45 times that of Earth.
Is TOI-2274 b in the Habitable Zone?
TOI-2274 b orbits inside the inner edge of the habitable zone of TOI-2274. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2274: 0.239–0.607 AU (conservative: 0.303–0.575 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-2274 b
The equilibrium temperature of TOI-2274 b is about 771 K (498 °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-2274 b — one full orbit around TOI-2274 — lasts 2.68 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.050 AU — closer to its star than Mercury is to the Sun.
How Was TOI-2274 b Discovered?
TOI-2274 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-2274 b?
TOI-2274 b is 159.4 light-years (48.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1867. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,805,440 years to make the journey.
The Host Star: TOI-2274
TOI-2274
- Spectral type
- M
- Surface temperature
- 3,943 K (Sun: 5,772 K)
- Mass
- 0.61 M☉
- Radius
- 0.63 R☉
- Luminosity
- 0.0866 L☉
Planetary System
TOI-2274 b is the only planet known to orbit TOI-2274 so far.
TOI-2274 b — Complete Data
| Radius | 2.450 Earth radii (0.219 Jupiter radii) |
|---|---|
| Orbital period | 2.68 days |
| Orbital distance | 0.050 AU |
| Equilibrium temperature | 771 K (498 °C) |
| Distance from Earth | 159.4 light-years (48.9 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-10-22. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2274 b
Is TOI-2274 b habitable?
No — TOI-2274 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2274 b?
TOI-2274 b is about 159 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,805,440 years to get there.
How big is TOI-2274 b compared to Earth?
TOI-2274 b has 2.45 times the radius of Earth.
How long is a year on TOI-2274 b?
One orbit around TOI-2274 takes 2.7 Earth days — short enough that 136 of its years would fit into one Earth year.
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