CoRoT-13 b
Astrophysical Synthesis & Habitability Characterization
CoRoT-13 b is a confirmed gas giant exoplanet orbiting the star CoRoT-13, located approximately 3747.3 light-years (1148.93 parsecs) from the Solar System. First announced in 2010 by CoRoT using the Transit detection technique (producing an estimated primary transit depth of 0.8108% across the stellar disk), this world measures 9.92 Earth radii (0.89 Jupiter radii) and has a measured mass of 415.704 Earth masses (1.31 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.35 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 4.22 g⊕ (41.38 m/s²), and an escape velocity of 72.4 km/s.
In its orbital architecture around CoRoT-13, CoRoT-13 b completes one full revolution every 4.035 Earth days at a semi-major axis of 0.051 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 137.5 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 1700 K (+1427°C / +2601°F) and receiving 546.53 S⊕ (~743,833 W/m²), CoRoT-13 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star CoRoT-13 is classified as a solar-type yellow star of spectral type G0 V with an effective photospheric temperature of 5,945 K, a radius of 1.01 R☉, a mass of 1.09 M☉, an estimated bolometric luminosity of 1.143 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.635 Gyr and a metallicity of [Fe/H] = 0.01 dex (near-solar heavy-element abundance). From Earth, CoRoT-13 shines at apparent V-band magnitude 15.005 (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: CoRoT · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | CoRoT-13 |
| Spectral Type | G0 V |
| Effective Temp (Teff) | 5,945 K |
| Stellar Radius | 1.0100 R☉ |
| Stellar Mass | 1.0900 M☉ |
| Bolometric Luminosity | 1.143 L☉ |
| Metallicity [Fe/H] | 0.010 dex |
| Stellar Age | 1.635 Gyr |
| Apparent Magnitude | V: 15.005 · G: 14.915 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.051000 AU |
| Orbital Period | 4.035 days |
| Mean Orbital Velocity | 137.5 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.0200° |
| Mean Bulk Density | 2.35 g/cm³ (72.4 km/s vesc) |
| Insolation Flux | 546.5339 S⊕ (~743,833 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3747.300 LY (1148.930 pc) |