CoRoT-27 b
Astrophysical Synthesis & Habitability Characterization
CoRoT-27 b is a confirmed gas giant exoplanet orbiting the star CoRoT-27, located approximately 3295.1 light-years (1010.28 parsecs) from the Solar System. First announced in 2014 by CoRoT using the Transit detection technique (producing an estimated primary transit depth of 0.918% across the stellar disk), this world measures 11.287 Earth radii (1.01 Jupiter radii) and has a measured mass of 3302.11 Earth masses (10.39 Jupiter masses). Combining its mass and radius yields a mean bulk density of 12.66 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 25.92 g⊕ (254.19 m/s²), and an escape velocity of 191.3 km/s.
In its orbital architecture around CoRoT-27, CoRoT-27 b completes one full revolution every 3.575 Earth days at a semi-major axis of 0.0476 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 144.8 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.065 carries the world between 0.0445 AU at periapsis and 0.0507 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1500 K (+1227°C / +2241°F) and receiving 300.87 S⊕ (~409,484 W/m²), CoRoT-27 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star CoRoT-27 is classified as a solar-type yellow star of spectral type G2 with an effective photospheric temperature of 5,900 K, a radius of 1.08 R☉, a mass of 1.05 M☉, an estimated bolometric luminosity of 1.268 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.21 Gyr and a metallicity of [Fe/H] = -0.1 dex (near-solar heavy-element abundance). From Earth, CoRoT-27 shines at apparent V-band magnitude 15.774 (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-27 |
| Spectral Type | G2 |
| Effective Temp (Teff) | 5,900 K |
| Stellar Radius | 1.0800 R☉ |
| Stellar Mass | 1.0500 M☉ |
| Bolometric Luminosity | 1.268 L☉ |
| Metallicity [Fe/H] | -0.100 dex |
| Stellar Age | 4.210 Gyr |
| Apparent Magnitude | V: 15.774 · G: 15.390 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.047600 AU |
| Orbital Period | 3.575 days |
| Mean Orbital Velocity | 144.8 km/s |
| Orbital Eccentricity (e) | 0.06500 |
| Orbital Inclination (i) | 86.7000° |
| Mean Bulk Density | 12.66 g/cm³ (191.3 km/s vesc) |
| Insolation Flux | 300.8697 S⊕ (~409,484 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3295.100 LY (1010.280 pc) |