Pr0211 c
Pr0211 c is a cold gas giant orbiting Pr0211 in the constellation Cancer. It lies about 596 light-years from Earth and was discovered in 2016 using the radial velocity method.
Is Pr0211 c in the Habitable Zone?
Pr0211 c orbits beyond the outer edge of the habitable zone of Pr0211. At that distance, any surface water would almost certainly be frozen.
Habitable zone of Pr0211: 0.537–1.283 AU (conservative: 0.680–1.217 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 Pr0211 c — one full orbit around Pr0211 — lasts 4,850.0 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 5.500 AU. Its orbit is highly elliptical (eccentricity 0.71), swinging dramatically closer to and farther from its star.
How Was Pr0211 c Discovered?
Pr0211 c was discovered in 2016 using the radial velocity method, with observations from Roque de los Muchachos 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 Pr0211 c?
Pr0211 c is 595.9 light-years (182.7 parsecs) from Earth. Light arriving here tonight left the planet around the year 1431. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,487,840 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. Pr0211 c scores 0.09, ranking #4,491 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Pr0211
Pr0211 c belongs to a system of 2 stars; it orbits Pr0211.
Pr0211
- Surface temperature
- 5,300 K (Sun: 5,772 K)
- Mass
- 0.94 M☉
- Radius
- 0.83 R☉
- Age
- 0.6 billion years (Sun: 4.6)
The Pr0211 Planetary System
Pr0211 c is one of 2 known planets in the Pr0211 system. Its siblings:
- Pr0211 b (Hot Jupiter)
Pr0211 c — Complete Data
| Mass (best estimate) | 2,475.90 Earth masses |
|---|---|
| Orbital period | 4,850.00 days |
| Orbital distance | 5.500 AU |
| Eccentricity | 0.710 |
| Earth Similarity Index | 0.09 |
| Distance from Earth | 595.9 light-years (182.7 parsecs) |
| Constellation | Cancer |
| Discovery method | Radial Velocity |
| Discovery facility | Roque de los Muchachos Observatory |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-02-10. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Pr0211 c
Is Pr0211 c habitable?
No — Pr0211 c orbits outside the habitable zone of Pr0211 and is likely too cold for liquid water on its surface.
How far away is Pr0211 c?
Pr0211 c is about 596 light-years from Earth in the constellation Cancer. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,487,840 years to get there.
How long is a year on Pr0211 c?
One orbit around Pr0211 takes 4,850.0 Earth days.
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