GJ 9066 c
Astrophysical Synthesis & Habitability Characterization
GJ 9066 c is a confirmed gas giant exoplanet orbiting the star GJ 9066, located approximately 14.6 light-years (4.47 parsecs) from the Solar System. First announced in 2020 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 9.6 Earth radii (0.86 Jupiter radii) and has a measured mass of 66.744 Earth masses (0.21 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.42 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.72 g⊕ (7.06 m/s²), and an escape velocity of 29.5 km/s.
In its orbital architecture around GJ 9066, GJ 9066 c completes one full revolution every 771.36 Earth days (2.11Julian years) at a semi-major axis of 0.88 AU (comparable to the inner terrestrial zone between Venus, Earth at 1.00 AU, and Mars at 1.52 AU). Its mean orbital velocity is approximately 12.4 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.46, swinging from 0.4752 AU at periapsis out to 1.2848 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 66 K (-207°C / -341°F) and an incident flux of 0.00 S⊕ (~4 W/m²), surface water and volatile species on GJ 9066 c would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star GJ 9066 is classified as a low-mass red dwarf of spectral type M5.0 V with an effective photospheric temperature of 3,154 K, a radius of 0.164 R☉, a mass of 0.15 M☉, an estimated bolometric luminosity of 0.00239 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.13 dex (metal-poor relative to the Sun). From Earth, GJ 9066 shines at apparent V-band magnitude 12.71 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
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: Multiple Observatories · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | GJ 9066 |
| Spectral Type | M5.0 V |
| Effective Temp (Teff) | 3,154 K |
| Stellar Radius | 0.1640 R☉ |
| Stellar Mass | 0.1500 M☉ |
| Bolometric Luminosity | 0.00239 L☉ |
| Metallicity [Fe/H] | -0.130 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.710 · G: 10.671 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.880000 AU |
| Orbital Period | 771.36 days |
| Mean Orbital Velocity | 12.4 km/s |
| Orbital Eccentricity (e) | 0.46000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.42 g/cm³ (29.5 km/s vesc) |
| Insolation Flux | 0.0033 S⊕ (~4 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 14.600 LY (4.471 pc) |