TIC 139270665 c
TIC 139270665 c is a cold gas giant orbiting the G2 star TIC 139270665 in the constellation Lynx. It lies about 619 light-years from Earth and was discovered in 2024 using the radial velocity method.
Is TIC 139270665 c in the Habitable Zone?
TIC 139270665 c orbits beyond the outer edge of the habitable zone of TIC 139270665. At that distance, any surface water would almost certainly be frozen.
Habitable zone of TIC 139270665: 0.776–1.824 AU (conservative: 0.983–1.730 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 ›
Temperature on TIC 139270665 c
The equilibrium temperature of TIC 139270665 c is about 200 K (-73 °C) — well below freezing. This estimate ignores any atmosphere, which could change surface temperatures dramatically — Earth's greenhouse effect adds about 33 °C. It receives 0.21 times the stellar energy that Earth gets from the Sun.
Orbit and Year Length
A year on TIC 139270665 c — one full orbit around TIC 139270665 — lasts 1,010.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.000 AU. Its orbit is highly elliptical (eccentricity 0.57), swinging dramatically closer to and farther from its star.
How Was TIC 139270665 c Discovered?
TIC 139270665 c was discovered in 2024 using the radial velocity method, with observations from Lick Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is TIC 139270665 c?
TIC 139270665 c is 619.3 light-years (189.9 parsecs) from Earth. Light arriving here tonight left the planet around the year 1407. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,899,680 years to make the journey.
The Host Star: TIC 139270665
TIC 139270665
- Spectral type
- G2
- Surface temperature
- 5,844 K (Sun: 5,772 K)
- Mass
- 1.03 M☉
- Radius
- 1.02 R☉
- Luminosity
- 1.0770 L☉
- Age
- 3.4 billion years (Sun: 4.6)
The TIC 139270665 Planetary System
TIC 139270665 c is one of 2 known planets in the TIC 139270665 system. Its siblings:
- TIC 139270665 b (Cold Gas Giant)
TIC 139270665 c — Complete Data
| Mass (best estimate) | 1,554.18 Earth masses |
|---|---|
| Orbital period | 1,010.00 days |
| Orbital distance | 2.000 AU |
| Eccentricity | 0.566 |
| Equilibrium temperature | 200 K (-73 °C) |
| Stellar irradiation | 0.21× Earth |
| Distance from Earth | 619.3 light-years (189.9 parsecs) |
| Constellation | Lynx |
| Discovery method | Radial Velocity |
| Discovery facility | Lick Observatory |
| Discovery year | 2024 |
Data: NASA Exoplanet Archive, last updated 2024-05-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TIC 139270665 c
Is TIC 139270665 c habitable?
No — TIC 139270665 c orbits outside the habitable zone of TIC 139270665 and is likely too cold for liquid water on its surface.
How far away is TIC 139270665 c?
TIC 139270665 c is about 619 light-years from Earth in the constellation Lynx. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,899,680 years to get there.
How long is a year on TIC 139270665 c?
One orbit around TIC 139270665 takes 1,010.0 Earth days.
Explore TIC 139270665 c in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
