TOI-6383 A b
TOI-6383 A b is a hot Jupiter orbiting the M3 star TOI-6383 A in the constellation Camelopardalis. It lies about 559 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-6383 A b?
TOI-6383 A b has a radius of 11.29 times that of Earth, or 1.01 times the radius of Jupiter. Its mass is 331 times that of Earth, giving it a density of 1.26 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-6383 A b in the Habitable Zone?
TOI-6383 A b orbits inside the inner edge of the habitable zone of TOI-6383 A. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-6383 A: 0.148–0.385 AU (conservative: 0.187–0.365 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-6383 A b
The equilibrium temperature of TOI-6383 A b is about 745 K (472 °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 51.30 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-6383 A b — one full orbit around TOI-6383 A — lasts just 43.0 hours, shorter than Mercury's 88-day year. It orbits at an average distance of 0.023 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.05).
How Was TOI-6383 A b Discovered?
TOI-6383 A b was discovered in 2024 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-6383 A b?
TOI-6383 A b is 558.8 light-years (171.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1468. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 9,834,880 years to make the journey.
The Host Star: TOI-6383 A
TOI-6383 A b belongs to a system of 2 stars; it orbits TOI-6383 A.
TOI-6383 A
- Spectral type
- M3
- Surface temperature
- 3,444 K (Sun: 5,772 K)
- Mass
- 0.46 M☉
- Radius
- 0.46 R☉
- Luminosity
- 0.0326 L☉
Planetary System
TOI-6383 A b is the only planet known to orbit TOI-6383 A so far.
TOI-6383 A b — Complete Data
| Radius | 11.290 Earth radii (1.008 Jupiter radii) |
|---|---|
| Mass | 331.00 Earth masses (1.040 Jupiter masses) |
| Density | 1.26 g/cm³ (Earth: 5.51) |
| Orbital period | 1.79 days |
| Orbital distance | 0.023 AU |
| Eccentricity | 0.050 |
| Equilibrium temperature | 745 K (472 °C) |
| Stellar irradiation | 51.30× Earth |
| Distance from Earth | 558.8 light-years (171.3 parsecs) |
| Constellation | Camelopardalis |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2025-01-09. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-6383 A b
Is TOI-6383 A b habitable?
No — TOI-6383 A b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-6383 A b?
TOI-6383 A b is about 559 light-years from Earth in the constellation Camelopardalis. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 9,834,880 years to get there.
How big is TOI-6383 A b compared to Earth?
TOI-6383 A b has 11.29 times the radius of Earth and about 331 times its mass.
How long is a year on TOI-6383 A b?
One orbit around TOI-6383 A takes 1.8 Earth days — short enough that 204 of its years would fit into one Earth year.
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