TOI-2088 b
TOI-2088 b is a sub-Neptune orbiting TOI-2088 in the constellation Draco. It lies about 413 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-2088 b?
TOI-2088 b has a radius of 3.68 times that of Earth. Its mass is 37.0 times that of Earth, giving it a density of 2.00 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-2088 b in the Habitable Zone?
TOI-2088 b orbits inside the inner edge of the habitable zone of TOI-2088. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2088: 0.515–1.240 AU (conservative: 0.652–1.176 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-2088 b
The equilibrium temperature of TOI-2088 b is about 300 K (27 °C) — in a range broadly comparable to Earth, whose equilibrium temperature is 255 K. 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-2088 b — one full orbit around TOI-2088 — lasts 124.7 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.472 AU — comparable to the inner Solar System.
How Was TOI-2088 b Discovered?
TOI-2088 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-2088 b?
TOI-2088 b is 412.5 light-years (126.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1614. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,260,000 years to make the journey.
The Host Star: TOI-2088
TOI-2088
- Surface temperature
- 5,081 K (Sun: 5,772 K)
- Mass
- 0.90 M☉
- Radius
- 0.85 R☉
- Luminosity
- 0.4350 L☉
- Age
- 4.5 billion years (Sun: 4.6)
Planetary System
TOI-2088 b is the only planet known to orbit TOI-2088 so far.
TOI-2088 b — Complete Data
| Radius | 3.683 Earth radii (0.329 Jupiter radii) |
|---|---|
| Mass | 37.00 Earth masses (0.116 Jupiter masses) |
| Density | 2.00 g/cm³ (Earth: 5.51) |
| Orbital period | 124.73 days |
| Orbital distance | 0.472 AU |
| Equilibrium temperature | 300 K (27 °C) |
| Distance from Earth | 412.5 light-years (126.5 parsecs) |
| Constellation | Draco |
| 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-2088 b
Is TOI-2088 b habitable?
No — TOI-2088 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2088 b?
TOI-2088 b is about 413 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,260,000 years to get there.
How big is TOI-2088 b compared to Earth?
TOI-2088 b has 3.68 times the radius of Earth and about 37.0 times its mass.
How long is a year on TOI-2088 b?
One orbit around TOI-2088 takes 124.7 Earth days.
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