TOI-6695 b
TOI-6695 b is a cold gas giant orbiting the F5V-G0V star TOI-6695 in the constellation Pyxis. It lies about 922 light-years from Earth and was discovered in 2025 using the transit method.
How Big Is TOI-6695 b?
TOI-6695 b has a radius of 9.53 times that of Earth, or 0.85 times the radius of Jupiter. Its mass is 66.7 times that of Earth, giving it a density of 0.41 g/cm³ — closer to gas planets like Jupiter (1.33 g/cm³).
Is TOI-6695 b in the Habitable Zone?
TOI-6695 b orbits inside the inner edge of the habitable zone of TOI-6695. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TOI-6695: 1.346–3.130 AU (conservative: 1.705–2.967 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Temperature on TOI-6695 b
The equilibrium temperature of TOI-6695 b is about 599 K (326 °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.
Orbit and Year Length
A year on TOI-6695 b — one full orbit around TOI-6695 — lasts 80.4 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.402 AU — comparable to the inner Solar System. Its orbit is nearly circular (eccentricity 0.040).
How Was TOI-6695 b Discovered?
TOI-6695 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-6695 b?
TOI-6695 b is 921.5 light-years (282.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1105. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 16,218,400 years to make the journey.
The Host Star: TOI-6695
TOI-6695
- Spectral type
- F5V-G0V
- Surface temperature
- 6,400 K (Sun: 5,772 K)
- Mass
- 1.34 M☉
- Radius
- 1.52 R☉
- Luminosity
- 3.4700 L☉
- Age
- 2.1 billion years (Sun: 4.6)
The TOI-6695 Planetary System
TOI-6695 b is one of 2 known planets in the TOI-6695 system. Its siblings:
- TOI-6695 c (Cold Gas Giant)
TOI-6695 b — Complete Data
| Radius | 9.528 Earth radii (0.850 Jupiter radii) |
|---|---|
| Mass | 66.74 Earth masses (0.210 Jupiter masses) |
| Density | 0.41 g/cm³ (Earth: 5.51) |
| Orbital period | 80.39 days |
| Orbital distance | 0.402 AU |
| Eccentricity | 0.040 |
| Equilibrium temperature | 599 K (326 °C) |
| Distance from Earth | 921.5 light-years (282.5 parsecs) |
| Constellation | Pyxis |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2025 |
Data: NASA Exoplanet Archive, last updated 2025-05-27. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TOI-6695 b
Is TOI-6695 b habitable?
No — TOI-6695 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TOI-6695 b?
TOI-6695 b is about 922 light-years from Earth in the constellation Pyxis. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 16,218,400 years to get there.
How big is TOI-6695 b compared to Earth?
TOI-6695 b has 9.53 times the radius of Earth and about 66.7 times its mass.
How long is a year on TOI-6695 b?
One orbit around TOI-6695 takes 80.4 Earth days.
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