TOI-512 b
TOI-512 b is a super-Earth orbiting TOI-512 in the constellation Columba. It lies about 220 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-512 b?
TOI-512 b has a radius of 1.54 times that of Earth. Its mass is 3.6 times that of Earth, giving it a density of 5.62 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-512 b in the Habitable Zone?
The position of TOI-512 b relative to the habitable zone of TOI-512 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-512: 0.575–1.375 AU (conservative: 0.728–1.303 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-512 b
The equilibrium temperature of TOI-512 b is about 1,009 K (736 °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 127 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-512 b — one full orbit around TOI-512 — lasts 7.19 Earth days, shorter than Mercury's 88-day year. Its orbit is nearly circular (eccentricity 0.020).
How Was TOI-512 b Discovered?
TOI-512 b was discovered in 2025 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-512 b?
TOI-512 b is 219.8 light-years (67.4 parsecs) from Earth. Light arriving here tonight left the planet around the year 1807. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,868,480 years to make the journey.
The Host Star: TOI-512
TOI-512
- Surface temperature
- 5,277 K (Sun: 5,772 K)
- Mass
- 0.74 M☉
- Radius
- 0.89 R☉
- Luminosity
- 0.5534 L☉
- Age
- 8.2 billion years (Sun: 4.6)
Planetary System
TOI-512 b is the only planet known to orbit TOI-512 so far.
TOI-512 b — Complete Data
| Radius | 1.540 Earth radii (0.137 Jupiter radii) |
|---|---|
| Mass | 3.57 Earth masses (0.011 Jupiter masses) |
| Density | 5.62 g/cm³ (Earth: 5.51) |
| Orbital period | 7.19 days |
| Eccentricity | 0.020 |
| Equilibrium temperature | 1,009 K (736 °C) |
| Stellar irradiation | 127.00× Earth |
| Distance from Earth | 219.8 light-years (67.4 parsecs) |
| Constellation | Columba |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-03-09. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-512 b
Is TOI-512 b habitable?
TOI-512 b is not known to orbit within the habitable zone of TOI-512, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is TOI-512 b?
TOI-512 b is about 220 light-years from Earth in the constellation Columba. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,868,480 years to get there.
How big is TOI-512 b compared to Earth?
TOI-512 b has 1.54 times the radius of Earth and about 3.6 times its mass.
How long is a year on TOI-512 b?
One orbit around TOI-512 takes 7.2 Earth days — short enough that 51 of its years would fit into one Earth year.
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