HD 13724 c
HD 13724 c is a cold gas giant orbiting HD 13724 in the constellation Phoenix. It lies about 142 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is HD 13724 c in the Habitable Zone?
The position of HD 13724 c relative to the habitable zone of HD 13724 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 13724 c — one full orbit around HD 13724 — lasts 142.2 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.534 AU — comparable to the inner Solar System. Its orbit is highly elliptical (eccentricity 0.65), swinging dramatically closer to and farther from its star.
How Was HD 13724 c Discovered?
HD 13724 c was discovered in 2022 using the radial velocity method, with observations from Multiple Observatories.
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 HD 13724 c?
HD 13724 c is 141.8 light-years (43.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1885. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,495,680 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. HD 13724 c scores 0.27, ranking #2,691 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 13724
HD 13724
- Mass
- 1.00 M☉
Planetary System
HD 13724 c is the only planet known to orbit HD 13724 so far.
HD 13724 c — Complete Data
| Mass (best estimate) | 50.85 Earth masses |
|---|---|
| Orbital period | 142.23 days |
| Orbital distance | 0.534 AU |
| Eccentricity | 0.651 |
| Earth Similarity Index | 0.27 |
| Distance from Earth | 141.8 light-years (43.5 parsecs) |
| Constellation | Phoenix |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2023-06-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 13724 c
Is HD 13724 c habitable?
HD 13724 c is not known to orbit within the habitable zone of HD 13724, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 13724 c?
HD 13724 c is about 142 light-years from Earth in the constellation Phoenix. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,495,680 years to get there.
How long is a year on HD 13724 c?
One orbit around HD 13724 takes 142.2 Earth days.
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