TYC 3667-1280-1 b
TYC 3667-1280-1 b is a hot Jupiter orbiting TYC 3667-1280-1 in the constellation Cassiopeia. It lies about 1,557 light-years from Earth and was discovered in 2016 using the radial velocity method.
Is TYC 3667-1280-1 b in the Habitable Zone?
TYC 3667-1280-1 b orbits inside the inner edge of the habitable zone of TYC 3667-1280-1. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of TYC 3667-1280-1: 3.812–9.170 AU (conservative: 4.828–8.694 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 TYC 3667-1280-1 b
The equilibrium temperature of TYC 3667-1280-1 b is about 1,350 K (1,077 °C) — hot enough to melt many metals. 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 TYC 3667-1280-1 b — one full orbit around TYC 3667-1280-1 — lasts 26.5 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.210 AU — closer to its star than Mercury is to the Sun. Its orbit is nearly circular (eccentricity 0.036).
How Was TYC 3667-1280-1 b Discovered?
TYC 3667-1280-1 b was discovered in 2016 using the radial velocity method, with observations from McDonald 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 TYC 3667-1280-1 b?
TYC 3667-1280-1 b is 1,557.4 light-years (477.5 parsecs) from Earth. Light arriving here tonight left the planet about 1,557 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 27,410,240 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. TYC 3667-1280-1 b scores 0.07, ranking #4,900 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TYC 3667-1280-1
TYC 3667-1280-1
- Surface temperature
- 5,130 K (Sun: 5,772 K)
- Mass
- 1.87 M☉
- Radius
- 6.26 R☉
- Luminosity
- 23.9883 L☉
- Age
- 1.4 billion years (Sun: 4.6)
Planetary System
TYC 3667-1280-1 b is the only planet known to orbit TYC 3667-1280-1 so far.
TYC 3667-1280-1 b — Complete Data
| Mass (best estimate) | 1,716.28 Earth masses |
|---|---|
| Orbital period | 26.47 days |
| Orbital distance | 0.210 AU |
| Eccentricity | 0.036 |
| Equilibrium temperature | 1,350 K (1,077 °C) |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 1,557.4 light-years (477.5 parsecs) |
| Constellation | Cassiopeia |
| Discovery method | Radial Velocity |
| Discovery facility | McDonald Observatory |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-03-29. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TYC 3667-1280-1 b
Is TYC 3667-1280-1 b habitable?
No — TYC 3667-1280-1 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is TYC 3667-1280-1 b?
TYC 3667-1280-1 b is about 1,557 light-years from Earth in the constellation Cassiopeia. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 27,410,240 years to get there.
How long is a year on TYC 3667-1280-1 b?
One orbit around TYC 3667-1280-1 takes 26.5 Earth days — short enough that 14 of its years would fit into one Earth year.
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