TOI-2287 b
TOI-2287 b is a super-Earth orbiting TOI-2287 in the constellation Ursa Minor. It lies about 310 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-2287 b?
TOI-2287 b has a radius of 1.80 times that of Earth.
Is TOI-2287 b in the Habitable Zone?
The position of TOI-2287 b relative to the habitable zone of TOI-2287 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-2287: 0.971–2.272 AU (conservative: 1.229–2.154 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-2287 b — one full orbit around TOI-2287 — lasts 11.8 Earth days, shorter than Mercury's 88-day year.
How Was TOI-2287 b Discovered?
TOI-2287 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-2287 b?
TOI-2287 b is 309.7 light-years (95.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1717. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 5,450,720 years to make the journey.
The Host Star: TOI-2287
TOI-2287
- Surface temperature
- 6,037 K (Sun: 5,772 K)
- Mass
- 1.12 M☉
- Radius
- 1.20 R☉
- Luminosity
- 1.7262 L☉
Planetary System
TOI-2287 b is the only planet known to orbit TOI-2287 so far.
TOI-2287 b — Complete Data
| Radius | 1.800 Earth radii (0.161 Jupiter radii) |
|---|---|
| Orbital period | 11.81 days |
| Distance from Earth | 309.7 light-years (95.0 parsecs) |
| Constellation | Ursa Minor |
| 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-2287 b
Is TOI-2287 b habitable?
TOI-2287 b is not known to orbit within the habitable zone of TOI-2287, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is TOI-2287 b?
TOI-2287 b is about 310 light-years from Earth in the constellation Ursa Minor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 5,450,720 years to get there.
How big is TOI-2287 b compared to Earth?
TOI-2287 b has 1.80 times the radius of Earth.
How long is a year on TOI-2287 b?
One orbit around TOI-2287 takes 11.8 Earth days — short enough that 31 of its years would fit into one Earth year.
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