TOI-3919 b
TOI-3919 b is a hot Jupiter orbiting TOI-3919 in the constellation Canes Venatici. It lies about 1,972 light-years from Earth and was discovered in 2024 using the transit method.
How Big Is TOI-3919 b?
TOI-3919 b has a radius of 12.32 times that of Earth, or 1.10 times the radius of Jupiter. Its mass is 1,233 times that of Earth, giving it a density of 3.63 g/cm³ — between that of rocky and gaseous planets.
Is TOI-3919 b in the Habitable Zone?
TOI-3919 b orbits inside the inner edge of the habitable zone of TOI-3919. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-3919: 1.084–2.533 AU (conservative: 1.372–2.402 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-3919 b
The equilibrium temperature of TOI-3919 b is about 1,198 K (925 °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.
Orbit and Year Length
A year on TOI-3919 b — one full orbit around TOI-3919 — lasts 7.43 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.080 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.26).
How Was TOI-3919 b Discovered?
TOI-3919 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-3919 b?
TOI-3919 b is 1,971.9 light-years (604.6 parsecs) from Earth. Light arriving here tonight left the planet about 1,972 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 34,705,440 years to make the journey.
The Host Star: TOI-3919
TOI-3919
- Surface temperature
- 6,100 K (Sun: 5,772 K)
- Mass
- 1.21 M☉
- Radius
- 1.32 R☉
- Luminosity
- 2.1680 L☉
- Age
- 3.1 billion years (Sun: 4.6)
Planetary System
TOI-3919 b is the only planet known to orbit TOI-3919 so far.
TOI-3919 b — Complete Data
| Radius | 12.319 Earth radii (1.099 Jupiter radii) |
|---|---|
| Mass | 1,233.17 Earth masses (3.880 Jupiter masses) |
| Density | 3.63 g/cm³ (Earth: 5.51) |
| Orbital period | 7.43 days |
| Orbital distance | 0.080 AU |
| Eccentricity | 0.259 |
| Equilibrium temperature | 1,198 K (925 °C) |
| Distance from Earth | 1,971.9 light-years (604.6 parsecs) |
| Constellation | Canes Venatici |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-11-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-3919 b
Is TOI-3919 b habitable?
No — TOI-3919 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-3919 b?
TOI-3919 b is about 1,972 light-years from Earth in the constellation Canes Venatici. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 34,705,440 years to get there.
How big is TOI-3919 b compared to Earth?
TOI-3919 b has 12.32 times the radius of Earth and about 1,233 times its mass.
How long is a year on TOI-3919 b?
One orbit around TOI-3919 takes 7.4 Earth days — short enough that 49 of its years would fit into one Earth year.
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