TOI-2005 b
TOI-2005 b is a cold gas giant orbiting TOI-2005 in the constellation Vela. It lies about 1,071 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-2005 b?
TOI-2005 b has a radius of 11.99 times that of Earth, or 1.07 times the radius of Jupiter. Its mass is 2,034 times that of Earth.
Is TOI-2005 b in the Habitable Zone?
TOI-2005 b orbits inside the inner edge of the habitable zone of TOI-2005. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2005: 2.106–4.856 AU (conservative: 2.667–4.604 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 ›
Orbit and Year Length
A year on TOI-2005 b — one full orbit around TOI-2005 — lasts 17.3 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.160 AU — closer to its star than Mercury is to the Sun. Its orbit is highly elliptical (eccentricity 0.60), swinging dramatically closer to and farther from its star.
How Was TOI-2005 b Discovered?
TOI-2005 b was discovered in 2025 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-2005 b?
TOI-2005 b is 1,071.3 light-years (328.5 parsecs) from Earth. Light arriving here tonight left the planet about 1,071 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 18,854,880 years to make the journey.
The Host Star: TOI-2005
TOI-2005
- Surface temperature
- 7,130 K (Sun: 5,772 K)
- Mass
- 1.59 M☉
- Radius
- 2.02 R☉
- Luminosity
- 9.1700 L☉
- Age
- 1.6 billion years (Sun: 4.6)
Planetary System
TOI-2005 b is the only planet known to orbit TOI-2005 so far.
TOI-2005 b — Complete Data
| Radius | 11.994 Earth radii (1.070 Jupiter radii) |
|---|---|
| Mass | 2,034.10 Earth masses (6.400 Jupiter masses) |
| Orbital period | 17.31 days |
| Orbital distance | 0.160 AU |
| Eccentricity | 0.597 |
| Distance from Earth | 1,071.3 light-years (328.5 parsecs) |
| Constellation | Vela |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-05-13. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2005 b
Is TOI-2005 b habitable?
No — TOI-2005 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2005 b?
TOI-2005 b is about 1,071 light-years from Earth in the constellation Vela. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 18,854,880 years to get there.
How big is TOI-2005 b compared to Earth?
TOI-2005 b has 11.99 times the radius of Earth and about 2,034 times its mass.
How long is a year on TOI-2005 b?
One orbit around TOI-2005 takes 17.3 Earth days — short enough that 21 of its years would fit into one Earth year.
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