TOI-2545 b
TOI-2545 b is a mini-Neptune orbiting TOI-2545 in the constellation Hydra. It lies about 349 light-years from Earth and was discovered in 2022 using the transit method.
How Big Is TOI-2545 b?
TOI-2545 b has a radius of 2.75 times that of Earth.
Is TOI-2545 b in the Habitable Zone?
The position of TOI-2545 b relative to the habitable zone of TOI-2545 cannot be precisely determined from the available orbital data.
Habitable zone of TOI-2545: 0.961–2.260 AU (conservative: 1.217–2.143 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-2545 b — one full orbit around TOI-2545 — lasts 7.99 Earth days, shorter than Mercury's 88-day year.
How Was TOI-2545 b Discovered?
TOI-2545 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-2545 b?
TOI-2545 b is 349.4 light-years (107.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1677. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,149,440 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-2545 b scores 0.22, ranking #3,581 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TOI-2545
TOI-2545
- Surface temperature
- 5,846 K (Sun: 5,772 K)
- Mass
- 1.06 M☉
- Radius
- 1.25 R☉
- Luminosity
- 1.6530 L☉
Planetary System
TOI-2545 b is the only planet known to orbit TOI-2545 so far.
TOI-2545 b — Complete Data
| Radius | 2.750 Earth radii (0.245 Jupiter radii) |
|---|---|
| Orbital period | 7.99 days |
| Earth Similarity Index | 0.22 |
| Distance from Earth | 349.4 light-years (107.1 parsecs) |
| Constellation | Hydra |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-10-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-2545 b
Is TOI-2545 b habitable?
TOI-2545 b is not known to orbit within the habitable zone of TOI-2545, and as a mini-Neptune it is an unlikely candidate for life as we know it.
How far away is TOI-2545 b?
TOI-2545 b is about 349 light-years from Earth in the constellation Hydra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,149,440 years to get there.
How big is TOI-2545 b compared to Earth?
TOI-2545 b has 2.75 times the radius of Earth.
How long is a year on TOI-2545 b?
One orbit around TOI-2545 takes 8.0 Earth days — short enough that 46 of its years would fit into one Earth year.
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