TOI-1472 c
TOI-1472 c is a super-Earth orbiting TOI-1472 in the constellation Cassiopeia. It lies about 397 light-years from Earth and was discovered in 2025 using the radial velocity method.
How Big Is TOI-1472 c?
TOI-1472 c has a radius of 3.33 times that of Earth. Its mass is 21.1 times that of Earth, giving it a density of 3.14 g/cm³ — between that of rocky and gaseous planets.
Is TOI-1472 c in the Habitable Zone?
TOI-1472 c orbits inside the inner edge of the habitable zone of TOI-1472. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1472: 0.510–1.228 AU (conservative: 0.646–1.165 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-1472 c
The equilibrium temperature of TOI-1472 c is about 662 K (389 °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-1472 c — one full orbit around TOI-1472 — lasts 15.5 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.116 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.17).
How Was TOI-1472 c Discovered?
TOI-1472 c was discovered in 2025 using the radial velocity method, with observations from Multiple Observatories.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is TOI-1472 c?
TOI-1472 c is 397.4 light-years (121.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1629. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,994,240 years to make the journey.
The Host Star: TOI-1472
TOI-1472
- Surface temperature
- 5,100 K (Sun: 5,772 K)
- Mass
- 0.87 M☉
- Radius
- 0.84 R☉
- Age
- 3.1 billion years (Sun: 4.6)
The TOI-1472 Planetary System
TOI-1472 c is one of 2 known planets in the TOI-1472 system. Its siblings:
- TOI-1472 b (Neptune-like)
TOI-1472 c — Complete Data
| Radius | 3.334 Earth radii (0.298 Jupiter radii) |
|---|---|
| Mass | 21.13 Earth masses (0.067 Jupiter masses) |
| Density | 3.14 g/cm³ (Earth: 5.51) |
| Orbital period | 15.54 days |
| Orbital distance | 0.116 AU |
| Eccentricity | 0.172 |
| Equilibrium temperature | 662 K (389 °C) |
| Distance from Earth | 397.4 light-years (121.8 parsecs) |
| Constellation | Cassiopeia |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-12-11. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1472 c
Is TOI-1472 c habitable?
No — TOI-1472 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1472 c?
TOI-1472 c is about 397 light-years from Earth in the constellation Cassiopeia. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,994,240 years to get there.
How big is TOI-1472 c compared to Earth?
TOI-1472 c has 3.33 times the radius of Earth and about 21.1 times its mass.
How long is a year on TOI-1472 c?
One orbit around TOI-1472 takes 15.5 Earth days — short enough that 24 of its years would fit into one Earth year.
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