TOI-1752 c
TOI-1752 c is a mini-Neptune orbiting the M1.0±0.5 V star TOI-1752 in the constellation Draco. It lies about 336 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-1752 c?
TOI-1752 c has a radius of 2.29 times that of Earth.
Is TOI-1752 c in the Habitable Zone?
TOI-1752 c orbits inside the inner edge of the habitable zone of TOI-1752. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1752: 0.183–0.469 AU (conservative: 0.232–0.445 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-1752 c
The equilibrium temperature of TOI-1752 c is about 291 K (18 °C) — in a range broadly comparable to Earth, whose equilibrium temperature is 255 K. 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-1752 c — one full orbit around TOI-1752 — lasts 32.7 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.161 AU — closer to its star than Mercury is to the Sun.
How Was TOI-1752 c Discovered?
TOI-1752 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-1752 c?
TOI-1752 c is 336.0 light-years (103.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1690. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 5,913,600 years to make the journey.
The Host Star: TOI-1752
TOI-1752
- Spectral type
- M1.0±0.5 V
- Surface temperature
- 3,762 K (Sun: 5,772 K)
- Mass
- 0.52 M☉
- Radius
- 0.53 R☉
- Luminosity
- 0.0505 L☉
The TOI-1752 Planetary System
TOI-1752 c is one of 2 known planets in the TOI-1752 system. Its siblings:
- TOI-1752 b (Super Earth)
TOI-1752 c — Complete Data
| Radius | 2.290 Earth radii (0.204 Jupiter radii) |
|---|---|
| Orbital period | 32.71 days |
| Orbital distance | 0.161 AU |
| Equilibrium temperature | 291 K (18 °C) |
| Distance from Earth | 336.0 light-years (103.0 parsecs) |
| Constellation | Draco |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-05-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1752 c
Is TOI-1752 c habitable?
No — TOI-1752 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1752 c?
TOI-1752 c is about 336 light-years from Earth in the constellation Draco. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 5,913,600 years to get there.
How big is TOI-1752 c compared to Earth?
TOI-1752 c has 2.29 times the radius of Earth.
How long is a year on TOI-1752 c?
One orbit around TOI-1752 takes 32.7 Earth days — short enough that 11 of its years would fit into one Earth year.
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