Kepler-10 b
Astrophysical Synthesis & Habitability Characterization
Kepler-10 b is a confirmed super-earth exoplanet orbiting the star Kepler-10, located approximately 605 light-years (185.51 parsecs) from the Solar System. First announced in 2011 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.016% across the stellar disk), this world measures 1.47 Earth radii and has a measured mass of 3.24 Earth masses. Combining its mass and radius yields a mean bulk density of 5.62 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.5 g⊕ (14.71 m/s²), and an escape velocity of 16.6 km/s.
In its orbital architecture around Kepler-10, Kepler-10 b completes one full revolution every 0.837 Earth days at a semi-major axis of 0.01685 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 218.9 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 2188 K (+1915°C / +3479°F) and receiving 3,741.78 S⊕ (~5,092,563 W/m²), Kepler-10 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-10 is classified as a stellar host with an effective photospheric temperature of 5,708 K, a radius of 1.065 R☉, a mass of 0.91 M☉, an estimated bolometric luminosity of 1.08 L☉. Stellar evolution modeling indicates an estimated stellar age of 10.6 Gyr and a metallicity of [Fe/H] = -0.15 dex (metal-poor relative to the Sun). From Earth, Kepler-10 shines at apparent V-band magnitude 11.043 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-10 system is a multi-planet architecture hosting 3 confirmed worlds, with Kepler-10 b sharing its stellar neighborhood alongside Kepler-10 c, Kepler-10 d.
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-10 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,708 K |
| Stellar Radius | 1.0650 R☉ |
| Stellar Mass | 0.9100 M☉ |
| Bolometric Luminosity | 1.08 L☉ |
| Metallicity [Fe/H] | -0.150 dex |
| Stellar Age | 10.600 Gyr |
| Apparent Magnitude | V: 11.043 · G: 10.919 |
| System Architecture | 1 Star, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.016850 AU |
| Orbital Period | 0.837 days |
| Mean Orbital Velocity | 218.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.8000° |
| Mean Bulk Density | 5.62 g/cm³ (16.6 km/s vesc) |
| Insolation Flux | 3741.7800 S⊕ (~5,092,563 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 605.000 LY (185.506 pc) |