TOI-2525 b
TOI-2525 b is a cold gas giant orbiting the K8 V star TOI-2525 in the constellation Pictor. It lies about 1,290 light-years from Earth and was discovered in 2023 using the transit method.
How Big Is TOI-2525 b?
TOI-2525 b has a radius of 8.68 times that of Earth, or 0.77 times the radius of Jupiter. Its mass is 26.7 times that of Earth, giving it a density of 0.23 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-2525 b in the Habitable Zone?
TOI-2525 b orbits inside the inner edge of the habitable zone of TOI-2525. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-2525: 0.470–1.131 AU (conservative: 0.595–1.073 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-2525 b — one full orbit around TOI-2525 — lasts 23.3 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.151 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.17).
How Was TOI-2525 b Discovered?
TOI-2525 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-2525 b?
TOI-2525 b is 1,289.6 light-years (395.4 parsecs) from Earth. Light arriving here tonight left the planet about 1,290 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 22,696,960 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-2525 b scores 0.16, ranking #4,141 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-2525
TOI-2525
- Spectral type
- K8 V
- Surface temperature
- 5,096 K (Sun: 5,772 K)
- Mass
- 0.85 M☉
- Radius
- 0.79 R☉
- Luminosity
- 0.3630 L☉
- Age
- 4.0 billion years (Sun: 4.6)
The TOI-2525 Planetary System
TOI-2525 b is one of 2 known planets in the TOI-2525 system. Its siblings:
- TOI-2525 c (Cold Gas Giant)
TOI-2525 b — Complete Data
| Radius | 8.676 Earth radii (0.774 Jupiter radii) |
|---|---|
| Mass | 26.70 Earth masses (0.084 Jupiter masses) |
| Density | 0.23 g/cm³ (Earth: 5.51) |
| Orbital period | 23.29 days |
| Orbital distance | 0.151 AU |
| Eccentricity | 0.170 |
| Earth Similarity Index | 0.16 |
| Distance from Earth | 1,289.6 light-years (395.4 parsecs) |
| Constellation | Pictor |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2023 |
Data: NASA Exoplanet Archive, last updated 2023-02-25. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2525 b
Is TOI-2525 b habitable?
No — TOI-2525 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-2525 b?
TOI-2525 b is about 1,290 light-years from Earth in the constellation Pictor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 22,696,960 years to get there.
How big is TOI-2525 b compared to Earth?
TOI-2525 b has 8.68 times the radius of Earth and about 26.7 times its mass.
How long is a year on TOI-2525 b?
One orbit around TOI-2525 takes 23.3 Earth days — short enough that 16 of its years would fit into one Earth year.
Explore TOI-2525 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
