Kepler-735 b
Astrophysical Synthesis & Habitability Characterization
Kepler-735 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-735, located approximately 2267 light-years (695.06 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.1143% across the stellar disk), this world measures 2.95 Earth radii and has a measured mass of 9.01 Earth masses. Combining its mass and radius yields a mean bulk density of 1.94 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 1.04 g⊕ (10.2 m/s²), and an escape velocity of 19.5 km/s.
In its orbital architecture around Kepler-735, Kepler-735 b completes one full revolution every 11.515 Earth days at a semi-major axis of 0.0965 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 91.2 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 657 K (+384°C / +723°F) and receiving 32.68 S⊕ (~44,476 W/m²), Kepler-735 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-735 is classified as a stellar host with an effective photospheric temperature of 5,107 K, a radius of 0.8 R☉, a mass of 0.85 M☉, an estimated bolometric luminosity of 0.391 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.37 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, Kepler-735 shines at apparent V-band magnitude 15.492 (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-735 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,107 K |
| Stellar Radius | 0.8000 R☉ |
| Stellar Mass | 0.8500 M☉ |
| Bolometric Luminosity | 0.391 L☉ |
| Metallicity [Fe/H] | 0.070 dex |
| Stellar Age | 4.370 Gyr |
| Apparent Magnitude | V: 15.492 · G: 15.385 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.096500 AU |
| Orbital Period | 11.515 days |
| Mean Orbital Velocity | 91.2 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.5900° |
| Mean Bulk Density | 1.94 g/cm³ (19.5 km/s vesc) |
| Insolation Flux | 32.6790 S⊕ (~44,476 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2267.000 LY (695.059 pc) |