CoRoT-25 b
Astrophysical Synthesis & Habitability Characterization
CoRoT-25 b is a confirmed gas giant exoplanet orbiting the star CoRoT-25, located approximately 3599.1 light-years (1103.48 parsecs) from the Solar System. First announced in 2013 by CoRoT using the Transit detection technique (producing an estimated primary transit depth of 0.8704% across the stellar disk), this world measures 12.11 Earth radii (1.08 Jupiter radii) and has a measured mass of 85.81 Earth masses (0.27 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.27 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.59 g⊕ (5.79 m/s²), and an escape velocity of 29.8 km/s.
In its orbital architecture around CoRoT-25, CoRoT-25 b completes one full revolution every 4.861 Earth days at a semi-major axis of 0.0578 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 129.4 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1330 K (+1057°C / +1935°F) and receiving 414.14 S⊕ (~563,649 W/m²), CoRoT-25 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star CoRoT-25 is classified as a warm F-type star of spectral type F9 with an effective photospheric temperature of 6,040 K, a radius of 1.19 R☉, a mass of 1.09 M☉, an estimated bolometric luminosity of 1.691 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.5 Gyr and a metallicity of [Fe/H] = -0.01 dex (near-solar heavy-element abundance). From Earth, CoRoT-25 shines at apparent V-band magnitude 14.79 (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: CoRoT · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | CoRoT-25 |
| Spectral Type | F9 |
| Effective Temp (Teff) | 6,040 K |
| Stellar Radius | 1.1900 R☉ |
| Stellar Mass | 1.0900 M☉ |
| Bolometric Luminosity | 1.691 L☉ |
| Metallicity [Fe/H] | -0.010 dex |
| Stellar Age | 4.500 Gyr |
| Apparent Magnitude | V: 14.790 · G: 14.711 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.057800 AU |
| Orbital Period | 4.861 days |
| Mean Orbital Velocity | 129.4 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.5000° |
| Mean Bulk Density | 0.27 g/cm³ (29.8 km/s vesc) |
| Insolation Flux | 414.1434 S⊕ (~563,649 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3599.100 LY (1103.480 pc) |