TIC 139702105 b
TIC 139702105 b is a mini-Neptune orbiting TIC 139702105 in the constellation Eridanus. It lies about 299 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TIC 139702105 b?
TIC 139702105 b has a radius of 2.45 times that of Earth.
Is TIC 139702105 b in the Habitable Zone?
The position of TIC 139702105 b relative to the habitable zone of TIC 139702105 cannot be precisely determined from the available orbital data.
Habitable zone of TIC 139702105: 0.932–2.197 AU (conservative: 1.180–2.083 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 TIC 139702105 b — one full orbit around TIC 139702105 — lasts 6.84 Earth days, shorter than Mercury's 88-day year.
How Was TIC 139702105 b Discovered?
TIC 139702105 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 TIC 139702105 b?
TIC 139702105 b is 299.4 light-years (91.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1727. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 5,269,440 years to make the journey.
The Host Star: TIC 139702105
TIC 139702105
- Surface temperature
- 5,742 K (Sun: 5,772 K)
- Radius
- 1.25 R☉
Planetary System
TIC 139702105 b is the only planet known to orbit TIC 139702105 so far.
TIC 139702105 b — Complete Data
| Radius | 2.453 Earth radii (0.219 Jupiter radii) |
|---|---|
| Orbital period | 6.84 days |
| Distance from Earth | 299.4 light-years (91.8 parsecs) |
| Constellation | Eridanus |
| Discovery method | Transit |
| Discovery facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery year | 2026 |
Data: NASA Exoplanet Archive, last updated 2026-04-23. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TIC 139702105 b
Is TIC 139702105 b habitable?
TIC 139702105 b is not known to orbit within the habitable zone of TIC 139702105, and as a mini-Neptune it is an unlikely candidate for life as we know it.
How far away is TIC 139702105 b?
TIC 139702105 b is about 299 light-years from Earth in the constellation Eridanus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 5,269,440 years to get there.
How big is TIC 139702105 b compared to Earth?
TIC 139702105 b has 2.45 times the radius of Earth.
How long is a year on TIC 139702105 b?
One orbit around TIC 139702105 takes 6.8 Earth days — short enough that 53 of its years would fit into one Earth year.
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