TIC 154870955 b
TIC 154870955 b is a sub-Neptune orbiting TIC 154870955 in the constellation Ursa Minor. It lies about 739 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TIC 154870955 b?
TIC 154870955 b has a radius of 3.09 times that of Earth.
Is TIC 154870955 b in the Habitable Zone?
The position of TIC 154870955 b relative to the habitable zone of TIC 154870955 cannot be precisely determined from the available orbital data.
Habitable zone of TIC 154870955: 0.386–0.944 AU (conservative: 0.489–0.895 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 154870955 b — one full orbit around TIC 154870955 — lasts 7.97 Earth days, shorter than Mercury's 88-day year.
How Was TIC 154870955 b Discovered?
TIC 154870955 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 154870955 b?
TIC 154870955 b is 738.6 light-years (226.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1288. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 12,999,360 years to make the journey.
The Host Star: TIC 154870955
TIC 154870955
- Surface temperature
- 4,740 K (Sun: 5,772 K)
- Radius
- 0.72 R☉
Planetary System
TIC 154870955 b is the only planet known to orbit TIC 154870955 so far.
TIC 154870955 b — Complete Data
| Radius | 3.095 Earth radii (0.276 Jupiter radii) |
|---|---|
| Orbital period | 7.97 days |
| Distance from Earth | 738.6 light-years (226.5 parsecs) |
| Constellation | Ursa Minor |
| 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 154870955 b
Is TIC 154870955 b habitable?
TIC 154870955 b is not known to orbit within the habitable zone of TIC 154870955, and as a sub-Neptune it is an unlikely candidate for life as we know it.
How far away is TIC 154870955 b?
TIC 154870955 b is about 739 light-years from Earth in the constellation Ursa Minor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 12,999,360 years to get there.
How big is TIC 154870955 b compared to Earth?
TIC 154870955 b has 3.09 times the radius of Earth.
How long is a year on TIC 154870955 b?
One orbit around TIC 154870955 takes 8.0 Earth days — short enough that 46 of its years would fit into one Earth year.
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