TOI-4468 c
TOI-4468 c is a sub-Neptune 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 c?
TOI-4468 c has a radius of 3.09 times that of Earth.
Is TOI-4468 c in the Habitable Zone?
TOI-4468 c 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 c
The equilibrium temperature of TOI-4468 c is about 846 K (573 °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 83.10 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-4468 c — one full orbit around TOI-4468 — lasts 7.01 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.067 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.12).
How Was TOI-4468 c Discovered?
TOI-4468 c 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 c?
TOI-4468 c 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 c is one of 2 known planets in the TOI-4468 system. Its siblings:
- TOI-4468 b (Hot Jupiter)
TOI-4468 c — Complete Data
| Radius | 3.090 Earth radii (0.276 Jupiter radii) |
|---|---|
| Orbital period | 7.01 days |
| Orbital distance | 0.067 AU |
| Eccentricity | 0.122 |
| Equilibrium temperature | 846 K (573 °C) |
| Stellar irradiation | 83.10× 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 c
Is TOI-4468 c habitable?
No — TOI-4468 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-4468 c?
TOI-4468 c 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 c compared to Earth?
TOI-4468 c has 3.09 times the radius of Earth.
How long is a year on TOI-4468 c?
One orbit around TOI-4468 takes 7.0 Earth days — short enough that 52 of its years would fit into one Earth year.
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