HD 33844 c
The parameters of this planet are disputed or ambiguous in the scientific literature.
HD 33844 c is a cold gas giant orbiting HD 33844 in the constellation Lepus. It lies about 345 light-years from Earth and was discovered in 2015 using the radial velocity method.
Is HD 33844 c in the Habitable Zone?
HD 33844 c orbits inside the inner edge of the habitable zone of HD 33844. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 33844: 3.007–7.312 AU (conservative: 3.809–6.933 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 33844 c — one full orbit around HD 33844 — lasts 916.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.240 AU. Its orbit is mildly elliptical (eccentricity 0.13).
How Was HD 33844 c Discovered?
HD 33844 c was discovered in 2015 using the radial velocity method, with observations from Anglo-Australian Telescope.
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 33844 c?
HD 33844 c is 345.0 light-years (105.8 parsecs) from Earth. Light arriving here tonight left the planet around the year 1681. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 6,072,000 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 33844 c scores 0.30, ranking #1,290 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 33844
HD 33844
- Surface temperature
- 4,861 K (Sun: 5,772 K)
- Mass
- 1.84 M☉
- Radius
- 5.39 R☉
The HD 33844 Planetary System
HD 33844 c is one of 2 known planets in the HD 33844 system. Its siblings:
- HD 33844 b (Cold Gas Giant)
HD 33844 c — Complete Data
| Mass (best estimate) | 556.20 Earth masses |
|---|---|
| Orbital period | 916.00 days |
| Orbital distance | 2.240 AU |
| Eccentricity | 0.130 |
| Earth Similarity Index | 0.30 |
| Distance from Earth | 345.0 light-years (105.8 parsecs) |
| Constellation | Lepus |
| Discovery method | Radial Velocity |
| Discovery facility | Anglo-Australian Telescope |
| Discovery year | 2015 |
Data: NASA Exoplanet Archive, last updated 2016-01-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 33844 c
Is HD 33844 c habitable?
No — HD 33844 c orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 33844 c?
HD 33844 c is about 345 light-years from Earth in the constellation Lepus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 6,072,000 years to get there.
How long is a year on HD 33844 c?
One orbit around HD 33844 takes 916.0 Earth days.
Explore HD 33844 c in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
