TOI-7510 b
TOI-7510 b is a cold gas giant orbiting the G3 star TOI-7510 in the constellation Telescopium. It lies about 812 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-7510 b?
TOI-7510 b has a radius of 7.31 times that of Earth, or 0.65 times the radius of Jupiter. Its mass is 18.1 times that of Earth, giving it a density of 0.26 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-7510 b in the Habitable Zone?
TOI-7510 b orbits inside the inner edge of the habitable zone of TOI-7510. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-7510: 0.763–1.800 AU (conservative: 0.966–1.707 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-7510 b
The equilibrium temperature of TOI-7510 b is about 878 K (605 °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-7510 b — one full orbit around TOI-7510 — lasts 11.5 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.102 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.06).
How Was TOI-7510 b Discovered?
TOI-7510 b was discovered in 2025 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-7510 b?
TOI-7510 b is 812.1 light-years (249.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1214. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 14,292,960 years to make the journey.
The Host Star: TOI-7510
TOI-7510
- Spectral type
- G3
- Surface temperature
- 5,720 K (Sun: 5,772 K)
- Mass
- 1.06 M☉
- Radius
- 1.03 R☉
- Luminosity
- 1.0260 L☉
The TOI-7510 Planetary System
TOI-7510 b is one of 3 known planets in the TOI-7510 system. Its siblings:
- TOI-7510 c (Cold Gas Giant)
- TOI-7510 d (Cold Gas Giant)
TOI-7510 b — Complete Data
| Radius | 7.310 Earth radii (0.652 Jupiter radii) |
|---|---|
| Mass | 18.10 Earth masses (0.057 Jupiter masses) |
| Density | 0.26 g/cm³ (Earth: 5.51) |
| Orbital period | 11.53 days |
| Orbital distance | 0.102 AU |
| Eccentricity | 0.057 |
| Equilibrium temperature | 878 K (605 °C) |
| Distance from Earth | 812.1 light-years (249.0 parsecs) |
| Constellation | Telescopium |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-12-11. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-7510 b
Is TOI-7510 b habitable?
No — TOI-7510 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-7510 b?
TOI-7510 b is about 812 light-years from Earth in the constellation Telescopium. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 14,292,960 years to get there.
How big is TOI-7510 b compared to Earth?
TOI-7510 b has 7.31 times the radius of Earth and about 18.1 times its mass.
How long is a year on TOI-7510 b?
One orbit around TOI-7510 takes 11.5 Earth days — short enough that 32 of its years would fit into one Earth year.
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