Kepler-910 b
Astrophysical Synthesis & Habitability Characterization
Kepler-910 b is a confirmed terrestrial exoplanet orbiting the star Kepler-910, located approximately 1305.6 light-years (400.29 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0025% across the stellar disk), this world measures 0.82 Earth radii and has a measured mass of 0.477 Earth masses. Combining its mass and radius yields a mean bulk density of 4.77 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.71 g⊕ (6.96 m/s²), and an escape velocity of 8.5 km/s.
In its orbital architecture around Kepler-910, Kepler-910 b completes one full revolution every 2.364 Earth days at a semi-major axis of 0.03752 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 172.6 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 1752 K (+1479°C / +2694°F) and receiving 2,108.07 S⊕ (~2,869,087 W/m²), Kepler-910 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-910 is classified as a stellar host with an effective photospheric temperature of 6,230 K, a radius of 1.5 R☉, a mass of 1.26 M☉, an estimated bolometric luminosity of 3.041 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.39 Gyr and a metallicity of [Fe/H] = 0.12 dex (metal-rich relative to the Sun). From Earth, Kepler-910 shines at apparent V-band magnitude 11.44 (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-910 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,230 K |
| Stellar Radius | 1.5000 R☉ |
| Stellar Mass | 1.2600 M☉ |
| Bolometric Luminosity | 3.041 L☉ |
| Metallicity [Fe/H] | 0.120 dex |
| Stellar Age | 3.390 Gyr |
| Apparent Magnitude | V: 11.440 · G: 11.529 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.037520 AU |
| Orbital Period | 2.364 days |
| Mean Orbital Velocity | 172.6 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.4400° |
| Mean Bulk Density | 4.77 g/cm³ (8.5 km/s vesc) |
| Insolation Flux | 2108.0730 S⊕ (~2,869,087 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1305.600 LY (400.289 pc) |