GJ 2030 c
Astrophysical Synthesis & Habitability Characterization
GJ 2030 c is a confirmed gas giant exoplanet orbiting the star GJ 2030, located approximately 120.9 light-years (37.08 parsecs) from the Solar System. First announced in 2022 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 12.3 Earth radii (1.1 Jupiter radii) and has a measured mass of 4069.157 Earth masses (12.8 Jupiter masses). Combining its mass and radius yields a mean bulk density of 12.06 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 26.9 g⊕ (263.8 m/s²), and an escape velocity of 203.5 km/s.
In its orbital architecture around GJ 2030, GJ 2030 c completes one full revolution every 25533.114 Earth days (69.91Julian years) at a semi-major axis of 16.761 AU (a wide outer-system orbit beyond Jupiter's 5.20 AU distance in our Solar System). Its mean orbital velocity is approximately 7.1 km/s (compared to Earth's 29.8 km/s). With a near-circular eccentricity of e = 0.041 (ranging from 16.0738 AU at periapsis to 17.4482 AU at apoapsis), the planet experiences minimal orbital distance variation.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 97 K (-176°C / -285°F) and an incident flux of 0.01 S⊕ (~20 W/m²), surface water and volatile species on GJ 2030 c would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star GJ 2030 is classified as a stellar host with an effective photospheric temperature of 5,485 K, a radius of 2.241 R☉, a mass of 0.96 M☉, an estimated bolometric luminosity of 4.078 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.4 dex (metal-poor relative to the Sun). From Earth, GJ 2030 shines at apparent V-band magnitude 6.209 (accessible to binoculars and small amateur telescopes) in the Southern celestial hemisphere. The GJ 2030 system is a multi-planet architecture hosting 2 confirmed worlds, with GJ 2030 c sharing its stellar neighborhood alongside GJ 2030 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: Multiple Observatories · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | GJ 2030 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,485 K |
| Stellar Radius | 2.2410 R☉ |
| Stellar Mass | 0.9600 M☉ |
| Bolometric Luminosity | 4.078 L☉ |
| Metallicity [Fe/H] | -0.400 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 6.209 · G: 6.021 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 16.761000 AU |
| Orbital Period | 25533.114 days |
| Mean Orbital Velocity | 7.1 km/s |
| Orbital Eccentricity (e) | 0.04100 |
| Orbital Inclination (i) | 16.9990° |
| Mean Bulk Density | 12.06 g/cm³ (203.5 km/s vesc) |
| Insolation Flux | 0.0146 S⊕ (~20 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 120.900 LY (37.079 pc) |