HD 184010 c
HD 184010 c is a cold gas giant orbiting the K0 III-IV star HD 184010 in the constellation Vulpecula. It lies about 198 light-years from Earth and was discovered in 2022 using the radial velocity method.
Is HD 184010 c in the Habitable Zone?
HD 184010 c orbits inside the inner edge of the habitable zone of HD 184010. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 184010: 2.838–6.869 AU (conservative: 3.594–6.512 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 HD 184010 c — one full orbit around HD 184010 — lasts 484.3 Earth days, longer than an Earth year. It orbits at an average distance of 1.334 AU.
How Was HD 184010 c Discovered?
HD 184010 c was discovered in 2022 using the radial velocity method, with observations from Okayama Astrophysical 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 HD 184010 c?
HD 184010 c is 198.3 light-years (60.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1828. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,490,080 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 184010 c scores 0.20, ranking #3,911 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 184010
HD 184010
- Spectral type
- K0 III-IV
- Surface temperature
- 4,971 K (Sun: 5,772 K)
- Mass
- 1.35 M☉
- Radius
- 4.86 R☉
- Luminosity
- 13.0900 L☉
- Age
- 2.8 billion years (Sun: 4.6)
The HD 184010 Planetary System
HD 184010 c is one of 3 known planets in the HD 184010 system. Its siblings:
- HD 184010 b (Cold Gas Giant)
- HD 184010 d (Cold Gas Giant)
HD 184010 c — Complete Data
| Mass (best estimate) | 95.35 Earth masses |
|---|---|
| Orbital period | 484.30 days |
| Orbital distance | 1.334 AU |
| Earth Similarity Index | 0.20 |
| Distance from Earth | 198.3 light-years (60.8 parsecs) |
| Constellation | Vulpecula |
| Discovery method | Radial Velocity |
| Discovery facility | Okayama Astrophysical Observatory |
| Discovery year | 2022 |
Data: NASA Exoplanet Archive, last updated 2022-10-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 184010 c
Is HD 184010 c habitable?
No — HD 184010 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 184010 c?
HD 184010 c is about 198 light-years from Earth in the constellation Vulpecula. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,490,080 years to get there.
How long is a year on HD 184010 c?
One orbit around HD 184010 takes 484.3 Earth days.
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