HD 115404 A c
HD 115404 A c is a cold gas giant orbiting HD 115404 A in the constellation Coma Berenices. It lies about 36 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is HD 115404 A c in the Habitable Zone?
The position of HD 115404 A c relative to the habitable zone of HD 115404 A cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 115404 A c — one full orbit around HD 115404 A — lasts 15,319.2 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 11.364 AU. Its orbit is mildly elliptical (eccentricity 0.21).
How Was HD 115404 A c Discovered?
HD 115404 A 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 115404 A c?
HD 115404 A c is 35.8 light-years (11.0 parsecs) from Earth. Light arriving here tonight left the planet around the year 1991. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 630,080 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 115404 A c scores 0.07, ranking #4,833 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 115404 A
HD 115404 A
- Mass
- 0.83 M☉
The HD 115404 A Planetary System
HD 115404 A c is one of 2 known planets in the HD 115404 A system. Its siblings:
- HD 115404 A b (Neptune-like)
HD 115404 A c — Complete Data
| Mass | 3,279.67 Earth masses (10.319 Jupiter masses) |
|---|---|
| Orbital period | 15,319.23 days |
| Orbital distance | 11.364 AU |
| Eccentricity | 0.211 |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 35.8 light-years (11.0 parsecs) |
| Constellation | Coma Berenices |
| 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 115404 A c
Is HD 115404 A c habitable?
HD 115404 A c is not known to orbit within the habitable zone of HD 115404 A, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 115404 A c?
HD 115404 A c is about 36 light-years from Earth in the constellation Coma Berenices. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 630,080 years to get there.
How long is a year on HD 115404 A c?
One orbit around HD 115404 A takes 15,319.2 Earth days.
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