TOI-2364 b
TOI-2364 b is a hot Jupiter orbiting TOI-2364 in the constellation Monoceros. It lies about 716 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is TOI-2364 b?
TOI-2364 b has a radius of 8.61 times that of Earth, or 0.77 times the radius of Jupiter. Its mass is 71.5 times that of Earth, giving it a density of 0.61 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-2364 b in the Habitable Zone?
TOI-2364 b orbits inside the inner edge of the habitable zone of TOI-2364. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2364: 0.577–1.379 AU (conservative: 0.731–1.308 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-2364 b
The equilibrium temperature of TOI-2364 b is about 1,091 K (818 °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 237 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-2364 b — one full orbit around TOI-2364 — lasts 4.02 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.049 AU — closer to its star than Mercury is to the Sun.
How Was TOI-2364 b Discovered?
TOI-2364 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-2364 b?
TOI-2364 b is 716.3 light-years (219.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1310. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 12,606,880 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-2364 b scores 0.10, ranking #4,420 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-2364
TOI-2364
- Surface temperature
- 5,306 K (Sun: 5,772 K)
- Mass
- 0.95 M☉
- Radius
- 0.89 R☉
- Luminosity
- 0.5600 L☉
- Age
- 3.5 billion years (Sun: 4.6)
Planetary System
TOI-2364 b is the only planet known to orbit TOI-2364 so far.
TOI-2364 b — Complete Data
| Radius | 8.608 Earth radii (0.768 Jupiter radii) |
|---|---|
| Mass | 71.51 Earth masses (0.225 Jupiter masses) |
| Density | 0.61 g/cm³ (Earth: 5.51) |
| Orbital period | 4.02 days |
| Orbital distance | 0.049 AU |
| Equilibrium temperature | 1,091 K (818 °C) |
| Stellar irradiation | 237.00× Earth |
| Earth Similarity Index | 0.10 |
| Distance from Earth | 716.3 light-years (219.6 parsecs) |
| Constellation | Monoceros |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-02-27. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2364 b
Is TOI-2364 b habitable?
No — TOI-2364 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2364 b?
TOI-2364 b is about 716 light-years from Earth in the constellation Monoceros. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 12,606,880 years to get there.
How big is TOI-2364 b compared to Earth?
TOI-2364 b has 8.61 times the radius of Earth and about 71.5 times its mass.
How long is a year on TOI-2364 b?
One orbit around TOI-2364 takes 4.0 Earth days — short enough that 91 of its years would fit into one Earth year.
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