TYC 2187-512-1 b
TYC 2187-512-1 b is a cold gas giant orbiting the M1.0 V star TYC 2187-512-1 in the constellation Pegasus. It lies about 51 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is TYC 2187-512-1 b in the Habitable Zone?
TYC 2187-512-1 b orbits beyond the outer edge of the habitable zone of TYC 2187-512-1. At that distance, any surface water would almost certainly be frozen.
Habitable zone of TYC 2187-512-1: 0.166–0.426 AU (conservative: 0.211–0.404 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 TYC 2187-512-1 b — one full orbit around TYC 2187-512-1 — lasts 691.9 Earth days, longer than an Earth year. It orbits at an average distance of 1.220 AU. Its orbit is mildly elliptical (eccentricity 0.05).
How Was TYC 2187-512-1 b Discovered?
TYC 2187-512-1 b was discovered in 2022 using the radial velocity method, with observations from Calar Alto 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 2187-512-1 b?
TYC 2187-512-1 b is 50.5 light-years (15.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1976. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 888,800 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 2187-512-1 b scores 0.10, ranking #4,435 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: TYC 2187-512-1
TYC 2187-512-1
- Spectral type
- M1.0 V
- Surface temperature
- 3,734 K (Sun: 5,772 K)
- Mass
- 0.50 M☉
- Radius
- 0.50 R☉
- Luminosity
- 0.0416 L☉
Planetary System
TYC 2187-512-1 b is the only planet known to orbit TYC 2187-512-1 so far.
TYC 2187-512-1 b — Complete Data
| Mass (best estimate) | 104.88 Earth masses |
|---|---|
| Orbital period | 691.90 days |
| Orbital distance | 1.220 AU |
| Eccentricity | 0.050 |
| Earth Similarity Index | 0.10 |
| Distance from Earth | 50.5 light-years (15.5 parsecs) |
| Constellation | Pegasus |
| Discovery method | Radial Velocity |
| Discovery facility | Calar Alto Observatory |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-05-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About TYC 2187-512-1 b
Is TYC 2187-512-1 b habitable?
No — TYC 2187-512-1 b orbits outside the habitable zone of TYC 2187-512-1 and is likely too cold for liquid water on its surface.
How far away is TYC 2187-512-1 b?
TYC 2187-512-1 b is about 51 light-years from Earth in the constellation Pegasus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 888,800 years to get there.
How long is a year on TYC 2187-512-1 b?
One orbit around TYC 2187-512-1 takes 691.9 Earth days.
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