TOI-5007 b
TOI-5007 b is a hot Jupiter orbiting the M1±0.5 star TOI-5007 in the constellation Triangulum Australe. It lies about 663 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-5007 b?
TOI-5007 b has a radius of 11.07 times that of Earth, or 0.99 times the radius of Jupiter. Its mass is 211 times that of Earth, giving it a density of 0.85 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-5007 b in the Habitable Zone?
TOI-5007 b orbits inside the inner edge of the habitable zone of TOI-5007. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-5007: 0.231–0.590 AU (conservative: 0.292–0.560 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-5007 b
The equilibrium temperature of TOI-5007 b is about 774 K (501 °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. It receives 85.30 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-5007 b — one full orbit around TOI-5007 — lasts 2.54 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.031 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.07).
How Was TOI-5007 b Discovered?
TOI-5007 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-5007 b?
TOI-5007 b is 663.2 light-years (203.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1363. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 11,672,320 years to make the journey.
The Host Star: TOI-5007
TOI-5007
- Spectral type
- M1±0.5
- Surface temperature
- 3,793 K (Sun: 5,772 K)
- Mass
- 0.63 M☉
- Radius
- 0.66 R☉
- Luminosity
- 0.0803 L☉
- Age
- 4.0 billion years (Sun: 4.6)
Planetary System
TOI-5007 b is the only planet known to orbit TOI-5007 so far.
TOI-5007 b — Complete Data
| Radius | 11.074 Earth radii (0.988 Jupiter radii) |
|---|---|
| Mass | 211.04 Earth masses (0.664 Jupiter masses) |
| Density | 0.85 g/cm³ (Earth: 5.51) |
| Orbital period | 2.54 days |
| Orbital distance | 0.031 AU |
| Eccentricity | 0.074 |
| Equilibrium temperature | 774 K (501 °C) |
| Stellar irradiation | 85.30× Earth |
| Distance from Earth | 663.2 light-years (203.4 parsecs) |
| Constellation | Triangulum Australe |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-04-30. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-5007 b
Is TOI-5007 b habitable?
No — TOI-5007 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-5007 b?
TOI-5007 b is about 663 light-years from Earth in the constellation Triangulum Australe. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 11,672,320 years to get there.
How big is TOI-5007 b compared to Earth?
TOI-5007 b has 11.07 times the radius of Earth and about 211 times its mass.
How long is a year on TOI-5007 b?
One orbit around TOI-5007 takes 2.5 Earth days — short enough that 144 of its years would fit into one Earth year.
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