Kepler-395 b
Astrophysical Synthesis & Habitability Characterization
Kepler-395 b is a confirmed terrestrial exoplanet orbiting the star Kepler-395, located approximately 1374.4 light-years (421.38 parsecs) from the Solar System. First announced in 2014 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0288% across the stellar disk), this world measures 1.03 Earth radii and has a measured mass of 1.08 Earth masses. Combining its mass and radius yields a mean bulk density of 5.45 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.02 g⊕ (10 m/s²), and an escape velocity of 11.5 km/s.
In its orbital architecture around Kepler-395, Kepler-395 b completes one full revolution every 7.054 Earth days at a semi-major axis of 0.061 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 94.1 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 576 K (+303°C / +577°F) and receiving 17.80 S⊕ (~24,226 W/m²), Kepler-395 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-395 is classified as a stellar host with an effective photospheric temperature of 4,262 K, a radius of 0.556 R☉, a mass of 0.6228 M☉, an estimated bolometric luminosity of 0.092 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.6 Gyr and a metallicity of [Fe/H] = -0.02 dex (near-solar heavy-element abundance). From Earth, Kepler-395 shines at apparent V-band magnitude 16.592 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-395 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-395 b sharing its stellar neighborhood alongside Kepler-395 c.
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-395 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,262 K |
| Stellar Radius | 0.5560 R☉ |
| Stellar Mass | 0.6228 M☉ |
| Bolometric Luminosity | 0.092 L☉ |
| Metallicity [Fe/H] | -0.020 dex |
| Stellar Age | 1.600 Gyr |
| Apparent Magnitude | V: 16.592 · G: 15.959 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.061000 AU |
| Orbital Period | 7.054 days |
| Mean Orbital Velocity | 94.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.3600° |
| Mean Bulk Density | 5.45 g/cm³ (11.5 km/s vesc) |
| Insolation Flux | 17.8000 S⊕ (~24,226 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1374.400 LY (421.382 pc) |