TOI-4468 b
TOI-4468 b is a hot Jupiter orbiting TOI-4468 in the constellation Draco. It lies about 1,225 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4468 b?
TOI-4468 b has a radius of 11.29 times that of Earth, or 1.01 times the radius of Jupiter. Its mass is 170 times that of Earth, giving it a density of 0.65 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-4468 b in the Habitable Zone?
TOI-4468 b orbits inside the inner edge of the habitable zone of TOI-4468. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-4468: 0.479–1.152 AU (conservative: 0.607–1.092 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-4468 b
The equilibrium temperature of TOI-4468 b is about 1,153 K (880 °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 295 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-4468 b — one full orbit around TOI-4468 — lasts 2.77 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.036 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.030).
How Was TOI-4468 b Discovered?
TOI-4468 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-4468 b?
TOI-4468 b is 1,224.8 light-years (375.5 parsecs) from Earth. Light arriving here tonight left the planet about 1,225 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 21,556,480 years to make the journey.
The Host Star: TOI-4468
TOI-4468
- Surface temperature
- 5,170 K (Sun: 5,772 K)
- Mass
- 0.81 M☉
- Radius
- 0.77 R☉
- Luminosity
- 0.3810 L☉
- Age
- 7.4 billion years (Sun: 4.6)
The TOI-4468 Planetary System
TOI-4468 b is one of 2 known planets in the TOI-4468 system. Its siblings:
- TOI-4468 c (Sub Neptune)
TOI-4468 b — Complete Data
| Radius | 11.290 Earth radii (1.007 Jupiter radii) |
|---|---|
| Mass | 170.10 Earth masses (0.535 Jupiter masses) |
| Density | 0.65 g/cm³ (Earth: 5.51) |
| Orbital period | 2.77 days |
| Orbital distance | 0.036 AU |
| Eccentricity | 0.030 |
| Equilibrium temperature | 1,153 K (880 °C) |
| Stellar irradiation | 295.00× Earth |
| Distance from Earth | 1,224.8 light-years (375.5 parsecs) |
| Constellation | Draco |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-10-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4468 b
Is TOI-4468 b habitable?
No — TOI-4468 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-4468 b?
TOI-4468 b is about 1,225 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 21,556,480 years to get there.
How big is TOI-4468 b compared to Earth?
TOI-4468 b has 11.29 times the radius of Earth and about 170 times its mass.
How long is a year on TOI-4468 b?
One orbit around TOI-4468 takes 2.8 Earth days — short enough that 132 of its years would fit into one Earth year.
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