Kepler-1066 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1066 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1066, located approximately 1122.8 light-years (344.25 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0487% across the stellar disk), this world measures 2.36 Earth radii and has a measured mass of 6.17 Earth masses. Combining its mass and radius yields a mean bulk density of 2.59 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.11 g⊕ (10.89 m/s²), and an escape velocity of 18.1 km/s.
In its orbital architecture around Kepler-1066, Kepler-1066 b completes one full revolution every 1.932 Earth days at a semi-major axis of 0.0298 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 167.8 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 1290 K (+1017°C / +1863°F) and receiving 710.02 S⊕ (~966,336 W/m²), Kepler-1066 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1066 is classified as a stellar host with an effective photospheric temperature of 5,762 K, a radius of 0.98 R☉, a mass of 0.98 M☉, an estimated bolometric luminosity of 0.95 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.8 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1066 shines at apparent V-band magnitude 13.115 (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: Kepler · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | Kepler-1066 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,762 K |
| Stellar Radius | 0.9800 R☉ |
| Stellar Mass | 0.9800 M☉ |
| Bolometric Luminosity | 0.95 L☉ |
| Metallicity [Fe/H] | -0.030 dex |
| Stellar Age | 3.800 Gyr |
| Apparent Magnitude | V: 13.115 · G: 13.024 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.029800 AU |
| Orbital Period | 1.932 days |
| Mean Orbital Velocity | 167.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 80.3700° |
| Mean Bulk Density | 2.59 g/cm³ (18.1 km/s vesc) |
| Insolation Flux | 710.0190 S⊕ (~966,336 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1122.800 LY (344.251 pc) |