TOI-7510 d
TOI-7510 d 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 d?
TOI-7510 d has a radius of 10.52 times that of Earth, or 0.94 times the radius of Jupiter. Its mass is 190 times that of Earth, giving it a density of 0.89 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-7510 d in the Habitable Zone?
TOI-7510 d 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 d
The equilibrium temperature of TOI-7510 d is about 542 K (269 °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-7510 d — one full orbit around TOI-7510 — lasts 48.9 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.267 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.040).
How Was TOI-7510 d Discovered?
TOI-7510 d 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 d?
TOI-7510 d 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 d is one of 3 known planets in the TOI-7510 system. Its siblings:
- TOI-7510 b (Cold Gas Giant)
- TOI-7510 c (Cold Gas Giant)
TOI-7510 d — Complete Data
| Radius | 10.520 Earth radii (0.939 Jupiter radii) |
|---|---|
| Mass | 190.00 Earth masses (0.597 Jupiter masses) |
| Density | 0.89 g/cm³ (Earth: 5.51) |
| Orbital period | 48.86 days |
| Orbital distance | 0.267 AU |
| Eccentricity | 0.040 |
| Equilibrium temperature | 542 K (269 °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 d
Is TOI-7510 d habitable?
No — TOI-7510 d orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-7510 d?
TOI-7510 d 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 d compared to Earth?
TOI-7510 d has 10.52 times the radius of Earth and about 190 times its mass.
How long is a year on TOI-7510 d?
One orbit around TOI-7510 takes 48.9 Earth days.
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