TOI-1075 b
TOI-1075 b is a super-Earth orbiting the K9 V/M0 V star TOI-1075 in the constellation Pavo. It lies about 201 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-1075 b?
TOI-1075 b has a radius of 1.79 times that of Earth. Its mass is 10.0 times that of Earth, giving it a density of 9.32 g/cm³ — comparable to rocky planets like Earth (5.51 g/cm³).
Is TOI-1075 b in the Habitable Zone?
TOI-1075 b orbits inside the inner edge of the habitable zone of TOI-1075. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-1075: 0.212–0.541 AU (conservative: 0.269–0.513 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-1075 b
The equilibrium temperature of TOI-1075 b is about 1,323 K (1,050 °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 509 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-1075 b — one full orbit around TOI-1075 — lasts just 14.5 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.012 AU — closer to its star than Mercury is to the Sun.
How Was TOI-1075 b Discovered?
TOI-1075 b was discovered in 2022 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-1075 b?
TOI-1075 b is 200.5 light-years (61.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1826. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,528,800 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-1075 b scores 0.27, ranking #2,681 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-1075
TOI-1075
- Spectral type
- K9 V/M0 V
- Surface temperature
- 3,875 K (Sun: 5,772 K)
- Mass
- 0.60 M☉
- Radius
- 0.58 R☉
- Age
- 6.0 billion years (Sun: 4.6)
Planetary System
TOI-1075 b is the only planet known to orbit TOI-1075 so far.
TOI-1075 b — Complete Data
| Radius | 1.791 Earth radii (0.160 Jupiter radii) |
|---|---|
| Mass | 9.95 Earth masses (0.031 Jupiter masses) |
| Density | 9.32 g/cm³ (Earth: 5.51) |
| Orbital period | 0.60 days |
| Orbital distance | 0.012 AU |
| Equilibrium temperature | 1,323 K (1,050 °C) |
| Stellar irradiation | 509.20× Earth |
| Earth Similarity Index | 0.27 |
| Distance from Earth | 200.5 light-years (61.5 parsecs) |
| Constellation | Pavo |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-11-07. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-1075 b
Is TOI-1075 b habitable?
No — TOI-1075 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-1075 b?
TOI-1075 b is about 201 light-years from Earth in the constellation Pavo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,528,800 years to get there.
How big is TOI-1075 b compared to Earth?
TOI-1075 b has 1.79 times the radius of Earth and about 10.0 times its mass.
How long is a year on TOI-1075 b?
One orbit around TOI-1075 takes 0.6 Earth days — short enough that 604 of its years would fit into one Earth year.
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