Kepler-1349 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1349 b is a confirmed sub-earth exoplanet orbiting the star Kepler-1349, located approximately 901.2 light-years (276.32 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0025% across the stellar disk), this world measures 0.7 Earth radii and has a measured mass of 0.271 Earth masses. Combining its mass and radius yields a mean bulk density of 4.36 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 0.55 g⊕ (5.39 m/s²), and an escape velocity of 7 km/s.
In its orbital architecture around Kepler-1349, Kepler-1349 b completes one full revolution every 2.128 Earth days at a semi-major axis of 0.03421 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 174.9 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 1668 K (+1395°C / +2543°F) and receiving 1,862.33 S⊕ (~2,534,631 W/m²), Kepler-1349 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1349 is classified as a stellar host with an effective photospheric temperature of 6,086 K, a radius of 1.28 R☉, a mass of 1.16 M☉, an estimated bolometric luminosity of 2.017 L☉. Stellar evolution modeling indicates an estimated stellar age of 2.88 Gyr and a metallicity of [Fe/H] = 0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1349 shines at apparent V-band magnitude 11.209 (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-1349 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,086 K |
| Stellar Radius | 1.2800 R☉ |
| Stellar Mass | 1.1600 M☉ |
| Bolometric Luminosity | 2.017 L☉ |
| Metallicity [Fe/H] | 0.030 dex |
| Stellar Age | 2.880 Gyr |
| Apparent Magnitude | V: 11.209 · G: 11.082 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.034210 AU |
| Orbital Period | 2.128 days |
| Mean Orbital Velocity | 174.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.9200° |
| Mean Bulk Density | 4.36 g/cm³ (7 km/s vesc) |
| Insolation Flux | 1862.3300 S⊕ (~2,534,631 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 901.200 LY (276.323 pc) |