Kepler-1335 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1335 b is a confirmed super-earth exoplanet orbiting the star Kepler-1335, located approximately 2028.2 light-years (621.85 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0323% across the stellar disk), this world measures 1.45 Earth radii and has a measured mass of 2.7 Earth masses. Combining its mass and radius yields a mean bulk density of 4.88 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.28 g⊕ (12.55 m/s²), and an escape velocity of 15.3 km/s.
In its orbital architecture around Kepler-1335, Kepler-1335 b completes one full revolution every 6.264 Earth days at a semi-major axis of 0.0615 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 106.8 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 809 K (+536°C / +997°F) and receiving 80.74 S⊕ (~109,889 W/m²), Kepler-1335 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1335 is classified as a stellar host with an effective photospheric temperature of 4,903 K, a radius of 0.74 R☉, a mass of 0.77 M☉, an estimated bolometric luminosity of 0.284 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.9 Gyr and a metallicity of [Fe/H] = -0.07 dex (near-solar heavy-element abundance). From Earth, Kepler-1335 shines at apparent V-band magnitude 15.248 (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-1335 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,903 K |
| Stellar Radius | 0.7400 R☉ |
| Stellar Mass | 0.7700 M☉ |
| Bolometric Luminosity | 0.284 L☉ |
| Metallicity [Fe/H] | -0.070 dex |
| Stellar Age | 4.900 Gyr |
| Apparent Magnitude | V: 15.248 · G: 15.304 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.061500 AU |
| Orbital Period | 6.264 days |
| Mean Orbital Velocity | 106.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.3300° |
| Mean Bulk Density | 4.88 g/cm³ (15.3 km/s vesc) |
| Insolation Flux | 80.7410 S⊕ (~109,889 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2028.200 LY (621.853 pc) |