Kepler-592 b
Astrophysical Synthesis & Habitability Characterization
Kepler-592 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-592, located approximately 3761 light-years (1153.13 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0444% across the stellar disk), this world measures 2.39 Earth radii and has a measured mass of 6.3 Earth masses. Combining its mass and radius yields a mean bulk density of 2.54 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.1 g⊕ (10.79 m/s²), and an escape velocity of 18.2 km/s.
In its orbital architecture around Kepler-592, Kepler-592 b completes one full revolution every 2.82 Earth days at a semi-major axis of 0.0397 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 153.1 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 1367 K (+1094°C / +2001°F) and receiving 935.83 S⊕ (~1,273,661 W/m²), Kepler-592 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-592 is classified as a stellar host with an effective photospheric temperature of 5,913 K, a radius of 1.04 R☉, a mass of 1.04 M☉, an estimated bolometric luminosity of 1.186 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.89 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-592 shines at apparent V-band magnitude 14.846 (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-592 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,913 K |
| Stellar Radius | 1.0400 R☉ |
| Stellar Mass | 1.0400 M☉ |
| Bolometric Luminosity | 1.186 L☉ |
| Metallicity [Fe/H] | -0.030 dex |
| Stellar Age | 3.890 Gyr |
| Apparent Magnitude | V: 14.846 · G: 14.628 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.039700 AU |
| Orbital Period | 2.82 days |
| Mean Orbital Velocity | 153.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.9100° |
| Mean Bulk Density | 2.54 g/cm³ (18.2 km/s vesc) |
| Insolation Flux | 935.8270 S⊕ (~1,273,661 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3761.000 LY (1153.130 pc) |