TIC 77319217 b
TIC 77319217 b is a sub-Neptune orbiting TIC 77319217 in the constellation Caelum. It lies about 873 light-years from Earth and was discovered in 2026 using the transit method.
How Big Is TIC 77319217 b?
TIC 77319217 b has a radius of 3.11 times that of Earth.
Is TIC 77319217 b in the Habitable Zone?
The position of TIC 77319217 b relative to the habitable zone of TIC 77319217 cannot be precisely determined from the available orbital data.
Habitable zone of TIC 77319217: 0.936–2.194 AU (conservative: 1.185–2.081 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 77319217 b — one full orbit around TIC 77319217 — lasts 7.55 Earth days, shorter than Mercury's 88-day year.
How Was TIC 77319217 b Discovered?
TIC 77319217 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 77319217 b?
TIC 77319217 b is 872.9 light-years (267.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1154. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 15,363,040 years to make the journey.
The Host Star: TIC 77319217
TIC 77319217
- Surface temperature
- 5,962 K (Sun: 5,772 K)
- Radius
- 1.18 R☉
Planetary System
TIC 77319217 b is the only planet known to orbit TIC 77319217 so far.
TIC 77319217 b — Complete Data
| Radius | 3.109 Earth radii (0.277 Jupiter radii) |
|---|---|
| Orbital period | 7.55 days |
| Distance from Earth | 872.9 light-years (267.6 parsecs) |
| Constellation | Caelum |
| 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 77319217 b
Is TIC 77319217 b habitable?
TIC 77319217 b is not known to orbit within the habitable zone of TIC 77319217, and as a sub-Neptune it is an unlikely candidate for life as we know it.
How far away is TIC 77319217 b?
TIC 77319217 b is about 873 light-years from Earth in the constellation Caelum. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 15,363,040 years to get there.
How big is TIC 77319217 b compared to Earth?
TIC 77319217 b has 3.11 times the radius of Earth.
How long is a year on TIC 77319217 b?
One orbit around TIC 77319217 takes 7.5 Earth days — short enough that 48 of its years would fit into one Earth year.
Explore TIC 77319217 b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
