CFHTWIR-Oph 98 b
Astrophysical Synthesis & Habitability Characterization
CFHTWIR-Oph 98 b is a confirmed gas giant exoplanet orbiting the star CFHTWIR-Oph 98 A. First announced in 2020 by Hubble Space Telescope using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 20.849 Earth radii (1.86 Jupiter radii) and has a measured mass of 2479.062 Earth masses (7.8 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.51 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 5.7 g⊕ (55.9 m/s²), and an escape velocity of 122 km/s.
In its orbital architecture around CFHTWIR-Oph 98 A, CFHTWIR-Oph 98 b completes one full revolution every 8040000 Earth days (22012.32Julian years) at a semi-major axis of 200 AU (a wide outer-system orbit beyond Jupiter's 5.20 AU distance in our Solar System). Its mean orbital velocity is approximately 0.3 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1800 K (+1527°C / +2781°F), CFHTWIR-Oph 98 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star CFHTWIR-Oph 98 A is classified as a low-mass red dwarf of spectral type M9-L1 with an effective photospheric temperature of 2,320 K, a radius of 0.245 R☉, a mass of 0.0147 M☉, an estimated bolometric luminosity of 0.00156 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.003 Gyr.
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: Hubble Space Telescope · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | CFHTWIR-Oph 98 A |
| Spectral Type | M9-L1 |
| Effective Temp (Teff) | 2,320 K |
| Stellar Radius | 0.2450 R☉ |
| Stellar Mass | 0.0147 M☉ |
| Bolometric Luminosity | 0.00156 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.003 Gyr |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 200.000000 AU |
| Orbital Period | 8040000 days |
| Mean Orbital Velocity | 0.3 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 1.51 g/cm³ (122 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | — |