KOINTREAU-3 b
Astrophysical Synthesis & Habitability Characterization
KOINTREAU-3 b is a confirmed gas giant exoplanet orbiting the star ISO-Oph 96, located approximately 458.5 light-years (140.56 parsecs) from the Solar System. First announced in 2026 by W. M. Keck Observatory using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 13.1 Earth radii (1.17 Jupiter radii) and has a measured mass of 1080.617 Earth masses (3.4 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.65 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 6.3 g⊕ (61.78 m/s²), and an escape velocity of 101.6 km/s.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 9 K (-264°C / -443°F), surface water and volatile species on KOINTREAU-3 b would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star ISO-Oph 96 is classified as an orange K-type star of spectral type K6-M1 with an effective photospheric temperature of 3,920 K, a radius of 0.7308 R☉, a mass of 0.41 M☉, an estimated bolometric luminosity of 0.113 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.002 Gyr and a metallicity of [Fe/H] = -0.05 dex (near-solar heavy-element abundance). From Earth, ISO-Oph 96 shines at apparent Gaia G-band magnitude 16.602 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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: W. M. Keck Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | ISO-Oph 96 |
| Spectral Type | K6-M1 |
| Effective Temp (Teff) | 3,920 K |
| Stellar Radius | 0.7308 R☉ |
| Stellar Mass | 0.4100 M☉ |
| Bolometric Luminosity | 0.113 L☉ |
| Metallicity [Fe/H] | -0.050 dex |
| Stellar Age | 0.002 Gyr |
| Apparent Magnitude | · G: 16.602 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 342.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 2.65 g/cm³ (101.6 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 458.500 LY (140.563 pc) |