Kepler-1585 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1585 b is a confirmed super-earth exoplanet orbiting the star Kepler-1585, located approximately 3080.4 light-years (944.47 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0325% across the stellar disk), this world measures 1.79 Earth radii and has a measured mass of 3.86 Earth masses. Combining its mass and radius yields a mean bulk density of 3.71 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.2 g⊕ (11.77 m/s²), and an escape velocity of 16.4 km/s.
In its orbital architecture around Kepler-1585, Kepler-1585 b completes one full revolution every 3.583 Earth days at a semi-major axis of 0.0445 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 135.1 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 1064 K (+791°C / +1456°F) and receiving 182.94 S⊕ (~248,983 W/m²), Kepler-1585 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1585 is classified as a stellar host with an effective photospheric temperature of 5,538 K, a radius of 0.91 R☉, a mass of 0.94 M☉, an estimated bolometric luminosity of 0.699 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.37 Gyr and a metallicity of [Fe/H] = 0.08 dex (metal-rich relative to the Sun). From Earth, Kepler-1585 shines at apparent V-band magnitude 16.326 (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-1585 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,538 K |
| Stellar Radius | 0.9100 R☉ |
| Stellar Mass | 0.9400 M☉ |
| Bolometric Luminosity | 0.699 L☉ |
| Metallicity [Fe/H] | 0.080 dex |
| Stellar Age | 4.370 Gyr |
| Apparent Magnitude | V: 16.326 · G: 15.977 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.044500 AU |
| Orbital Period | 3.583 days |
| Mean Orbital Velocity | 135.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.5500° |
| Mean Bulk Density | 3.71 g/cm³ (16.4 km/s vesc) |
| Insolation Flux | 182.9410 S⊕ (~248,983 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3080.400 LY (944.465 pc) |