TOI-2000 c
TOI-2000 c is a hot Jupiter orbiting TOI-2000 in the constellation Carina. It lies about 573 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is TOI-2000 c?
TOI-2000 c has a radius of 8.14 times that of Earth, or 0.73 times the radius of Jupiter. Its mass is 81.7 times that of Earth, giving it a density of 0.83 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-2000 c in the Habitable Zone?
TOI-2000 c orbits inside the inner edge of the habitable zone of TOI-2000. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2000: 0.812–1.921 AU (conservative: 1.028–1.822 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-2000 c
The equilibrium temperature of TOI-2000 c is about 1,038 K (765 °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 149 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-2000 c — one full orbit around TOI-2000 — lasts 9.13 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.088 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.06).
How Was TOI-2000 c Discovered?
TOI-2000 c 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-2000 c?
TOI-2000 c is 573.1 light-years (175.7 parsecs) from Earth. Light arriving here tonight left the planet around the year 1453. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,086,560 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-2000 c scores 0.11, ranking #4,373 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-2000
TOI-2000
- Surface temperature
- 5,611 K (Sun: 5,772 K)
- Mass
- 1.08 M☉
- Radius
- 1.13 R☉
- Luminosity
- 1.1470 L☉
- Age
- 5.3 billion years (Sun: 4.6)
The TOI-2000 Planetary System
TOI-2000 c is one of 2 known planets in the TOI-2000 system. Its siblings:
- TOI-2000 b (Super Earth)
TOI-2000 c — Complete Data
| Radius | 8.140 Earth radii (0.727 Jupiter radii) |
|---|---|
| Mass | 81.70 Earth masses (0.257 Jupiter masses) |
| Density | 0.83 g/cm³ (Earth: 5.51) |
| Orbital period | 9.13 days |
| Orbital distance | 0.088 AU |
| Eccentricity | 0.063 |
| Equilibrium temperature | 1,038 K (765 °C) |
| Stellar irradiation | 149.00× Earth |
| Earth Similarity Index | 0.11 |
| Distance from Earth | 573.1 light-years (175.7 parsecs) |
| Constellation | Carina |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-06-27. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2000 c
Is TOI-2000 c habitable?
No — TOI-2000 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2000 c?
TOI-2000 c is about 573 light-years from Earth in the constellation Carina. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,086,560 years to get there.
How big is TOI-2000 c compared to Earth?
TOI-2000 c has 8.14 times the radius of Earth and about 81.7 times its mass.
How long is a year on TOI-2000 c?
One orbit around TOI-2000 takes 9.1 Earth days — short enough that 40 of its years would fit into one Earth year.
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