Kepler-1130 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1130 b is a confirmed terrestrial exoplanet orbiting the star Kepler-1130, located approximately 813.2 light-years (249.34 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0082% across the stellar disk), this world measures 0.8 Earth radii and has a measured mass of 0.437 Earth masses. Combining its mass and radius yields a mean bulk density of 4.71 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.68 g⊕ (6.67 m/s²), and an escape velocity of 8.3 km/s.
In its orbital architecture around Kepler-1130, Kepler-1130 b completes one full revolution every 5.453 Earth days at a semi-major axis of 0.05963 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 119 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 904 K (+631°C / +1168°F) and receiving 162.65 S⊕ (~221,367 W/m²), Kepler-1130 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1130 is classified as a stellar host with an effective photospheric temperature of 5,403 K, a radius of 0.81 R☉, a mass of 0.9 M☉, an estimated bolometric luminosity of 0.502 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.58 Gyr and a metallicity of [Fe/H] = -0.06 dex (near-solar heavy-element abundance). From Earth, Kepler-1130 shines at apparent V-band magnitude 12.509 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-1130 system is a multi-planet architecture hosting 3 confirmed worlds, with Kepler-1130 b sharing its stellar neighborhood alongside Kepler-1130 c, Kepler-1130 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-1130 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,403 K |
| Stellar Radius | 0.8100 R☉ |
| Stellar Mass | 0.9000 M☉ |
| Bolometric Luminosity | 0.502 L☉ |
| Metallicity [Fe/H] | -0.060 dex |
| Stellar Age | 1.580 Gyr |
| Apparent Magnitude | V: 12.509 · G: 12.396 |
| System Architecture | 2 Stars, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.059630 AU |
| Orbital Period | 5.453 days |
| Mean Orbital Velocity | 119 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.8300° |
| Mean Bulk Density | 4.71 g/cm³ (8.3 km/s vesc) |
| Insolation Flux | 162.6500 S⊕ (~221,367 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 813.200 LY (249.343 pc) |