Kepler-1457 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1457 b is a confirmed super-earth exoplanet orbiting the star Kepler-1457, located approximately 2902.4 light-years (889.89 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0326% across the stellar disk), this world measures 1.99 Earth radii and has a measured mass of 4.62 Earth masses. Combining its mass and radius yields a mean bulk density of 3.23 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.17 g⊕ (11.47 m/s²), and an escape velocity of 17 km/s.
In its orbital architecture around Kepler-1457, Kepler-1457 b completes one full revolution every 51.111 Earth days at a semi-major axis of 0.26391 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 56.2 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 478 K (+205°C / +401°F) and receiving 23.47 S⊕ (~31,940 W/m²), Kepler-1457 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1457 is classified as a stellar host with an effective photospheric temperature of 5,866 K, a radius of 1.01 R☉, a mass of 1.01 M☉, an estimated bolometric luminosity of 1.084 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.72 Gyr and a metallicity of [Fe/H] = -0.05 dex (near-solar heavy-element abundance). From Earth, Kepler-1457 shines at apparent V-band magnitude 14.066 (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-1457 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,866 K |
| Stellar Radius | 1.0100 R☉ |
| Stellar Mass | 1.0100 M☉ |
| Bolometric Luminosity | 1.084 L☉ |
| Metallicity [Fe/H] | -0.050 dex |
| Stellar Age | 3.720 Gyr |
| Apparent Magnitude | V: 14.066 · G: 14.028 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.263910 AU |
| Orbital Period | 51.111 days |
| Mean Orbital Velocity | 56.2 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.9700° |
| Mean Bulk Density | 3.23 g/cm³ (17 km/s vesc) |
| Insolation Flux | 23.4680 S⊕ (~31,940 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2902.400 LY (889.885 pc) |