CoRoT-29 b
Astrophysical Synthesis & Habitability Characterization
CoRoT-29 b is a confirmed gas giant exoplanet orbiting the star CoRoT-29, located approximately 2630.5 light-years (806.51 parsecs) from the Solar System. First announced in 2015 by CoRoT using the Transit detection technique (producing an estimated primary transit depth of 1.056% across the stellar disk), this world measures 10.088 Earth radii (0.9 Jupiter radii) and has a measured mass of 270.156 Earth masses (0.85 Jupiter masses). Combining its mass and radius yields a mean bulk density of 1.45 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 2.65 g⊕ (25.99 m/s²), and an escape velocity of 57.9 km/s.
In its orbital architecture around CoRoT-29, CoRoT-29 b completes one full revolution every 2.851 Earth days at a semi-major axis of 0.0386 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 147.3 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.082 carries the world between 0.0354 AU at periapsis and 0.0418 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1225 K (+952°C / +1746°F) and receiving 540.37 S⊕ (~735,440 W/m²), CoRoT-29 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star CoRoT-29 is classified as an orange K-type star of spectral type K0 V with an effective photospheric temperature of 5,260 K, a radius of 0.9 R☉, a mass of 0.97 M☉, an estimated bolometric luminosity of 0.556 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.5 Gyr and a metallicity of [Fe/H] = 0.2 dex (metal-rich relative to the Sun). From Earth, CoRoT-29 shines at apparent V-band magnitude 15.408 (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-29 |
| Spectral Type | K0 V |
| Effective Temp (Teff) | 5,260 K |
| Stellar Radius | 0.9000 R☉ |
| Stellar Mass | 0.9700 M☉ |
| Bolometric Luminosity | 0.556 L☉ |
| Metallicity [Fe/H] | 0.200 dex |
| Stellar Age | 4.500 Gyr |
| Apparent Magnitude | V: 15.408 · G: 15.239 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.038600 AU |
| Orbital Period | 2.851 days |
| Mean Orbital Velocity | 147.3 km/s |
| Orbital Eccentricity (e) | 0.08200 |
| Orbital Inclination (i) | 87.3000° |
| Mean Bulk Density | 1.45 g/cm³ (57.9 km/s vesc) |
| Insolation Flux | 540.3673 S⊕ (~735,440 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2630.500 LY (806.507 pc) |