Pr0211 c
Astrophysical Synthesis & Habitability Characterization
Pr0211 c is a confirmed gas giant exoplanet orbiting the star Pr0211, located approximately 595.9 light-years (182.71 parsecs) from the Solar System. First announced in 2016 by Roque de los Muchachos Observatory using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 12.6 Earth radii (1.12 Jupiter radii) and has a measured mass of 2475.896 Earth masses (7.79 Jupiter masses). Combining its mass and radius yields a mean bulk density of 6.82 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 15.6 g⊕ (152.98 m/s²), and an escape velocity of 156.8 km/s.
In its orbital architecture around Pr0211, Pr0211 c completes one full revolution every 4850 Earth days (13.28Julian years) at a semi-major axis of 5.5 AU (a wide outer-system orbit beyond Jupiter's 5.20 AU distance in our Solar System). Its mean orbital velocity is approximately 12.3 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.71, swinging from 1.595 AU at periapsis out to 9.405 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 99 K (-174°C / -281°F) and an incident flux of 0.02 S⊕ (~21 W/m²), surface water and volatile species on Pr0211 c would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star Pr0211 is classified as a stellar host with an effective photospheric temperature of 5,300 K, a radius of 0.827 R☉, a mass of 0.935 M☉, an estimated bolometric luminosity of 0.484 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.578 Gyr and a metallicity of [Fe/H] = 0.18 dex (metal-rich relative to the Sun). From Earth, Pr0211 shines at apparent V-band magnitude 12.163 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Pr0211 system is a multi-planet architecture hosting 2 confirmed worlds, with Pr0211 c sharing its stellar neighborhood alongside Pr0211 b.
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: Roque de los Muchachos Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | Pr0211 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,300 K |
| Stellar Radius | 0.8270 R☉ |
| Stellar Mass | 0.9350 M☉ |
| Bolometric Luminosity | 0.484 L☉ |
| Metallicity [Fe/H] | 0.180 dex |
| Stellar Age | 0.578 Gyr |
| Apparent Magnitude | V: 12.163 · G: 11.928 |
| System Architecture | 2 Stars, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 5.500000 AU |
| Orbital Period | 4850 days |
| Mean Orbital Velocity | 12.3 km/s |
| Orbital Eccentricity (e) | 0.71000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 6.82 g/cm³ (156.8 km/s vesc) |
| Insolation Flux | 0.0152 S⊕ (~21 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 595.900 LY (182.714 pc) |