TOI-1224 c
TOI-1224 c is a mini-Neptune orbiting TOI-1224 in the constellation Hydrus. It lies about 122 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-1224 c?
TOI-1224 c has a radius of 2.88 times that of Earth.
Is TOI-1224 c in the Habitable Zone?
The position of TOI-1224 c relative to the habitable zone of TOI-1224 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-1224: 0.116–0.304 AU (conservative: 0.147–0.288 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on TOI-1224 c — one full orbit around TOI-1224 — lasts 17.9 Earth days, shorter than Mercury's 88-day year.
How Was TOI-1224 c Discovered?
TOI-1224 c was discovered in 2024 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-1224 c?
TOI-1224 c is 121.8 light-years (37.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1905. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,143,680 years to make the journey.
The Host Star: TOI-1224
TOI-1224
- Surface temperature
- 3,326 K (Sun: 5,772 K)
- Mass
- 0.40 M☉
- Radius
- 0.40 R☉
- Luminosity
- 0.0201 L☉
- Age
- 0.2 billion years (Sun: 4.6)
The TOI-1224 Planetary System
TOI-1224 c is one of 2 known planets in the TOI-1224 system. Its siblings:
- TOI-1224 b (Mini Neptune)
TOI-1224 c — Complete Data
| Radius | 2.884 Earth radii (0.257 Jupiter radii) |
|---|---|
| Orbital period | 17.95 days |
| Distance from Earth | 121.8 light-years (37.3 parsecs) |
| Constellation | Hydrus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-07-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1224 c
Is TOI-1224 c habitable?
TOI-1224 c is not known to orbit within the habitable zone of TOI-1224, and as a mini-Neptune it is an unlikely candidate for life as we know it.
How far away is TOI-1224 c?
TOI-1224 c is about 122 light-years from Earth in the constellation Hydrus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,143,680 years to get there.
How big is TOI-1224 c compared to Earth?
TOI-1224 c has 2.88 times the radius of Earth.
How long is a year on TOI-1224 c?
One orbit around TOI-1224 takes 17.9 Earth days — short enough that 20 of its years would fit into one Earth year.
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