TOI-3884 b
TOI-3884 b is a hot Jupiter orbiting TOI-3884 in the constellation Virgo. It lies about 141 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-3884 b?
TOI-3884 b has a radius of 6.43 times that of Earth, or 0.57 times the radius of Jupiter. Its mass is 32.6 times that of Earth, giving it a density of 0.67 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-3884 b in the Habitable Zone?
TOI-3884 b orbits inside the inner edge of the habitable zone of TOI-3884. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-3884: 0.075–0.198 AU (conservative: 0.095–0.188 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-3884 b
The equilibrium temperature of TOI-3884 b is about 441 K (168 °C) — hotter than anywhere on Earth. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 6.29 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TOI-3884 b — one full orbit around TOI-3884 — lasts 4.54 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.036 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.06).
How Was TOI-3884 b Discovered?
TOI-3884 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-3884 b?
TOI-3884 b is 140.7 light-years (43.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1886. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,476,320 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-3884 b scores 0.26, ranking #2,985 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-3884
TOI-3884
- Surface temperature
- 3,180 K (Sun: 5,772 K)
- Mass
- 0.30 M☉
- Radius
- 0.30 R☉
Planetary System
TOI-3884 b is the only planet known to orbit TOI-3884 so far.
TOI-3884 b — Complete Data
| Radius | 6.430 Earth radii (0.574 Jupiter radii) |
|---|---|
| Mass | 32.59 Earth masses (0.103 Jupiter masses) |
| Density | 0.67 g/cm³ (Earth: 5.51) |
| Orbital period | 4.54 days |
| Orbital distance | 0.036 AU |
| Eccentricity | 0.060 |
| Equilibrium temperature | 441 K (168 °C) |
| Stellar irradiation | 6.29× Earth |
| Earth Similarity Index | 0.26 |
| Distance from Earth | 140.7 light-years (43.1 parsecs) |
| Constellation | Virgo |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2024-08-30. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-3884 b
Is TOI-3884 b habitable?
No — TOI-3884 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-3884 b?
TOI-3884 b is about 141 light-years from Earth in the constellation Virgo. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,476,320 years to get there.
How big is TOI-3884 b compared to Earth?
TOI-3884 b has 6.43 times the radius of Earth and about 32.6 times its mass.
How long is a year on TOI-3884 b?
One orbit around TOI-3884 takes 4.5 Earth days — short enough that 80 of its years would fit into one Earth year.
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