Kepler-1671 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1671 b is a confirmed super-earth exoplanet orbiting the star Kepler-1671, located approximately 1164.6 light-years (357.06 parsecs) from the Solar System. First announced in 2020 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0171% across the stellar disk), this world measures 1.326 Earth radii and has a measured mass of 2.32 Earth masses. Combining its mass and radius yields a mean bulk density of 5.49 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.32 g⊕ (12.94 m/s²), and an escape velocity of 14.8 km/s.
In its orbital architecture around Kepler-1671, Kepler-1671 b completes one full revolution every 4.168 Earth days at a semi-major axis of 0.04946 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 129.1 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 962 K (+689°C / +1272°F) and receiving 205.00 S⊕ (~279,005 W/m²), Kepler-1671 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1671 is classified as a stellar host with an effective photospheric temperature of 5,136 K, a radius of 0.9298 R☉, a mass of 0.866 M☉, an estimated bolometric luminosity of 0.54 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.24 Gyr and a metallicity of [Fe/H] = 0.25 dex (metal-rich relative to the Sun). From Earth, Kepler-1671 shines at apparent V-band magnitude 13.439 (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-1671 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,136 K |
| Stellar Radius | 0.9298 R☉ |
| Stellar Mass | 0.8660 M☉ |
| Bolometric Luminosity | 0.54 L☉ |
| Metallicity [Fe/H] | 0.250 dex |
| Stellar Age | 2.240 Gyr |
| Apparent Magnitude | V: 13.439 · G: 13.278 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.049460 AU |
| Orbital Period | 4.168 days |
| Mean Orbital Velocity | 129.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.3300° |
| Mean Bulk Density | 5.49 g/cm³ (14.8 km/s vesc) |
| Insolation Flux | 205.0000 S⊕ (~279,005 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1164.600 LY (357.059 pc) |