TOI-1052 b
TOI-1052 b is a super-Earth orbiting TOI-1052 in the constellation Octans. It lies about 423 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is TOI-1052 b?
TOI-1052 b has a radius of 2.87 times that of Earth. Its mass is 16.9 times that of Earth, giving it a density of 3.93 g/cm³ — between that of rocky and gaseous planets.
Is TOI-1052 b in the Habitable Zone?
TOI-1052 b orbits inside the inner edge of the habitable zone of TOI-1052. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1052: 1.050–2.451 AU (conservative: 1.329–2.324 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 ›
Temperature on TOI-1052 b
The equilibrium temperature of TOI-1052 b is about 1,135 K (862 °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 246 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-1052 b — one full orbit around TOI-1052 — lasts 9.14 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.091 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.18).
How Was TOI-1052 b Discovered?
TOI-1052 b was discovered in 2023 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-1052 b?
TOI-1052 b is 423.4 light-years (129.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1603. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,451,840 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. TOI-1052 b scores 0.22, ranking #3,666 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-1052
TOI-1052
- Surface temperature
- 6,146 K (Sun: 5,772 K)
- Mass
- 1.20 M☉
- Radius
- 1.26 R☉
- Age
- 2.3 billion years (Sun: 4.6)
The TOI-1052 Planetary System
TOI-1052 b is one of 2 known planets in the TOI-1052 system. Its siblings:
- TOI-1052 c (Neptune-like)
TOI-1052 b — Complete Data
| Radius | 2.870 Earth radii (0.256 Jupiter radii) |
|---|---|
| Mass | 16.90 Earth masses (0.053 Jupiter masses) |
| Density | 3.93 g/cm³ (Earth: 5.51) |
| Orbital period | 9.14 days |
| Orbital distance | 0.091 AU |
| Eccentricity | 0.180 |
| Equilibrium temperature | 1,135 K (862 °C) |
| Stellar irradiation | 246.00× Earth |
| Earth Similarity Index | 0.22 |
| Distance from Earth | 423.4 light-years (129.8 parsecs) |
| Constellation | Octans |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-08-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1052 b
Is TOI-1052 b habitable?
No — TOI-1052 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1052 b?
TOI-1052 b is about 423 light-years from Earth in the constellation Octans. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,451,840 years to get there.
How big is TOI-1052 b compared to Earth?
TOI-1052 b has 2.87 times the radius of Earth and about 16.9 times its mass.
How long is a year on TOI-1052 b?
One orbit around TOI-1052 takes 9.1 Earth days — short enough that 40 of its years would fit into one Earth year.
Explore TOI-1052 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
