Kepler-1599 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1599 b is a confirmed super-earth exoplanet orbiting the star Kepler-1599, located approximately 4332 light-years (1328.2 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0225% across the stellar disk), this world measures 1.62 Earth radii and has a measured mass of 3.26 Earth masses. Combining its mass and radius yields a mean bulk density of 4.23 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.24 g⊕ (12.16 m/s²), and an escape velocity of 15.9 km/s.
In its orbital architecture around Kepler-1599, Kepler-1599 b completes one full revolution every 122.364 Earth days at a semi-major axis of 0.4823 AU (situated at an orbital separation between Mercury's 0.39 AU and Venus's 0.72 AU). Its mean orbital velocity is approximately 42.9 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 407 K (+134°C / +273°F) and receiving 8.20 S⊕ (~11,155 W/m²), Kepler-1599 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1599 is classified as a stellar host with an effective photospheric temperature of 5,767 K, a radius of 0.99 R☉, a mass of 0.99 M☉, an estimated bolometric luminosity of 0.973 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.27 Gyr and a metallicity of [Fe/H] = 0.02 dex (near-solar heavy-element abundance). From Earth, Kepler-1599 shines at apparent V-band magnitude 14.97 (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-1599 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,767 K |
| Stellar Radius | 0.9900 R☉ |
| Stellar Mass | 0.9900 M☉ |
| Bolometric Luminosity | 0.973 L☉ |
| Metallicity [Fe/H] | 0.020 dex |
| Stellar Age | 4.270 Gyr |
| Apparent Magnitude | V: 14.970 · G: 14.902 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.482300 AU |
| Orbital Period | 122.364 days |
| Mean Orbital Velocity | 42.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.8300° |
| Mean Bulk Density | 4.23 g/cm³ (15.9 km/s vesc) |
| Insolation Flux | 8.1960 S⊕ (~11,155 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 4332.000 LY (1328.200 pc) |