HD 11505 b
HD 11505 b is a cold gas giant orbiting HD 11505 in the constellation Cetus. It lies about 127 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is HD 11505 b in the Habitable Zone?
The position of HD 11505 b relative to the habitable zone of HD 11505 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 11505 b — one full orbit around HD 11505 — lasts 32,669.2 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 20.247 AU. Its orbit is mildly elliptical (eccentricity 0.14).
How Was HD 11505 b Discovered?
HD 11505 b 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 11505 b?
HD 11505 b is 127.1 light-years (39.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1899. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,236,960 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 11505 b scores 0.07, ranking #4,811 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 11505
HD 11505
- Mass
- 1.03 M☉
Planetary System
HD 11505 b is the only planet known to orbit HD 11505 so far.
HD 11505 b — Complete Data
| Mass | 2,510.53 Earth masses (7.899 Jupiter masses) |
|---|---|
| Orbital period | 32,669.22 days |
| Orbital distance | 20.247 AU |
| Eccentricity | 0.144 |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 127.1 light-years (39.0 parsecs) |
| Constellation | Cetus |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 11505 b
Is HD 11505 b habitable?
HD 11505 b is not known to orbit within the habitable zone of HD 11505, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 11505 b?
HD 11505 b is about 127 light-years from Earth in the constellation Cetus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,236,960 years to get there.
How long is a year on HD 11505 b?
One orbit around HD 11505 takes 32,669.2 Earth days.
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