TOI-4495 b
TOI-4495 b is a mini-Neptune orbiting TOI-4495 in the constellation Lyra. It lies about 431 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TOI-4495 b?
TOI-4495 b has a radius of 2.48 times that of Earth. Its mass is 7.7 times that of Earth, giving it a density of 2.71 g/cm³ — between that of rocky and gaseous planets.
Is TOI-4495 b in the Habitable Zone?
TOI-4495 b orbits inside the inner edge of the habitable zone of TOI-4495. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-4495: 1.105–2.578 AU (conservative: 1.400–2.445 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-4495 b
The equilibrium temperature of TOI-4495 b is about 1,735 K (1,462 °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-4495 b — one full orbit around TOI-4495 — lasts 2.57 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.040 AU — closer to its star than Mercury is to the Sun. Its orbit is mildly elliptical (eccentricity 0.08).
How Was TOI-4495 b Discovered?
TOI-4495 b was discovered in 2026 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-4495 b?
TOI-4495 b is 431.2 light-years (132.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1595. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 7,589,120 years to make the journey.
The Host Star: TOI-4495
TOI-4495
- Surface temperature
- 6,210 K (Sun: 5,772 K)
- Mass
- 1.25 M☉
- Radius
- 1.31 R☉
- Age
- 1.9 billion years (Sun: 4.6)
The TOI-4495 Planetary System
TOI-4495 b is one of 2 known planets in the TOI-4495 system. Its siblings:
- TOI-4495 c (Neptune-like)
TOI-4495 b — Complete Data
| Radius | 2.483 Earth radii (0.222 Jupiter radii) |
|---|---|
| Mass | 7.70 Earth masses (0.024 Jupiter masses) |
| Density | 2.71 g/cm³ (Earth: 5.51) |
| Orbital period | 2.57 days |
| Orbital distance | 0.040 AU |
| Eccentricity | 0.078 |
| Equilibrium temperature | 1,735 K (1,462 °C) |
| Distance from Earth | 431.2 light-years (132.2 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-02-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-4495 b
Is TOI-4495 b habitable?
No — TOI-4495 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-4495 b?
TOI-4495 b is about 431 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 7,589,120 years to get there.
How big is TOI-4495 b compared to Earth?
TOI-4495 b has 2.48 times the radius of Earth and about 7.7 times its mass.
How long is a year on TOI-4495 b?
One orbit around TOI-4495 takes 2.6 Earth days — short enough that 142 of its years would fit into one Earth year.
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