Kepler-967 b
Astrophysical Synthesis & Habitability Characterization
Kepler-967 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-967, located approximately 1854.3 light-years (568.55 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0725% across the stellar disk), this world measures 2.35 Earth radii and has a measured mass of 6.12 Earth masses. Combining its mass and radius yields a mean bulk density of 2.6 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-967, Kepler-967 b completes one full revolution every 13.227 Earth days at a semi-major axis of 0.1027 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 84.5 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 638 K (+365°C / +689°F) and receiving 39.10 S⊕ (~53,215 W/m²), Kepler-967 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-967 is classified as a stellar host with an effective photospheric temperature of 5,178 K, a radius of 0.8 R☉, a mass of 0.84 M☉, an estimated bolometric luminosity of 0.413 L☉. Stellar evolution modeling indicates an estimated stellar age of 5.89 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-967 shines at apparent V-band magnitude 14.702 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-967 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-967 b sharing its stellar neighborhood alongside Kepler-967 c.
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-967 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,178 K |
| Stellar Radius | 0.8000 R☉ |
| Stellar Mass | 0.8400 M☉ |
| Bolometric Luminosity | 0.413 L☉ |
| Metallicity [Fe/H] | -0.030 dex |
| Stellar Age | 5.890 Gyr |
| Apparent Magnitude | V: 14.702 · G: 14.451 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.102700 AU |
| Orbital Period | 13.227 days |
| Mean Orbital Velocity | 84.5 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.9800° |
| Mean Bulk Density | 2.6 g/cm³ (18.1 km/s vesc) |
| Insolation Flux | 39.1000 S⊕ (~53,215 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1854.300 LY (568.546 pc) |