TOI-2537 b
TOI-2537 b is a cold gas giant orbiting TOI-2537 in the constellation Taurus. It lies about 603 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-2537 b?
TOI-2537 b has a radius of 11.25 times that of Earth, or 1.00 times the radius of Jupiter. Its mass is 415 times that of Earth, giving it a density of 1.60 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-2537 b in the Habitable Zone?
TOI-2537 b orbits inside the inner edge of the habitable zone of TOI-2537. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2537: 0.432–1.051 AU (conservative: 0.548–0.996 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-2537 b
The equilibrium temperature of TOI-2537 b is about 338 K (65 °C) — hotter than anywhere on Earth. 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-2537 b — one full orbit around TOI-2537 — lasts 94.1 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.372 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.36), swinging dramatically closer to and farther from its star.
How Was TOI-2537 b Discovered?
TOI-2537 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-2537 b?
TOI-2537 b is 603.3 light-years (185.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1423. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,618,080 years to make the journey.
The Host Star: TOI-2537
TOI-2537
- Surface temperature
- 4,870 K (Sun: 5,772 K)
- Mass
- 0.77 M☉
- Radius
- 0.77 R☉
- Luminosity
- 0.3010 L☉
- Age
- 1.1 billion years (Sun: 4.6)
The TOI-2537 Planetary System
TOI-2537 b is one of 2 known planets in the TOI-2537 system. Its siblings:
- TOI-2537 c (Cold Gas Giant)
TOI-2537 b — Complete Data
| Radius | 11.254 Earth radii (1.004 Jupiter radii) |
|---|---|
| Mass | 415.40 Earth masses (1.307 Jupiter masses) |
| Density | 1.60 g/cm³ (Earth: 5.51) |
| Orbital period | 94.10 days |
| Orbital distance | 0.372 AU |
| Eccentricity | 0.364 |
| Equilibrium temperature | 338 K (65 °C) |
| Distance from Earth | 603.3 light-years (185.0 parsecs) |
| Constellation | Taurus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2025-03-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2537 b
Is TOI-2537 b habitable?
No — TOI-2537 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2537 b?
TOI-2537 b is about 603 light-years from Earth in the constellation Taurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,618,080 years to get there.
How big is TOI-2537 b compared to Earth?
TOI-2537 b has 11.25 times the radius of Earth and about 415 times its mass.
How long is a year on TOI-2537 b?
One orbit around TOI-2537 takes 94.1 Earth days.
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