Kepler-605 b
Astrophysical Synthesis & Habitability Characterization
Kepler-605 b is a confirmed super-earth exoplanet orbiting the star Kepler-605, located approximately 1815.3 light-years (556.58 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 1.44 Earth radii and has a measured mass of 2.67 Earth masses. Combining its mass and radius yields a mean bulk density of 4.93 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.29 g⊕ (12.65 m/s²), and an escape velocity of 15.2 km/s.
In its orbital architecture around Kepler-605, Kepler-605 b completes one full revolution every 3.384 Earth days at a semi-major axis of 0.04244 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 136.5 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 1133 K (+860°C / +1580°F) and receiving 316.72 S⊕ (~431,053 W/m²), Kepler-605 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-605 is classified as a stellar host with an effective photospheric temperature of 5,462 K, a radius of 0.88 R☉, a mass of 0.91 M☉, an estimated bolometric luminosity of 0.618 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.47 Gyr and a metallicity of [Fe/H] = 0.02 dex (near-solar heavy-element abundance). From Earth, Kepler-605 shines at apparent V-band magnitude 14.376 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-605 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-605 b sharing its stellar neighborhood alongside Kepler-605 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-605 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,462 K |
| Stellar Radius | 0.8800 R☉ |
| Stellar Mass | 0.9100 M☉ |
| Bolometric Luminosity | 0.618 L☉ |
| Metallicity [Fe/H] | 0.020 dex |
| Stellar Age | 4.470 Gyr |
| Apparent Magnitude | V: 14.376 · G: 14.136 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.042440 AU |
| Orbital Period | 3.384 days |
| Mean Orbital Velocity | 136.5 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 87.5400° |
| Mean Bulk Density | 4.93 g/cm³ (15.2 km/s vesc) |
| Insolation Flux | 316.7180 S⊕ (~431,053 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1815.300 LY (556.580 pc) |