Kepler-495 b
Astrophysical Synthesis & Habitability Characterization
Kepler-495 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-495, located approximately 2149.1 light-years (658.92 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.3337% across the stellar disk), this world measures 5.23 Earth radii (0.47 Jupiter radii) and has a measured mass of 23.8 Earth masses. Combining its mass and radius yields a mean bulk density of 0.92 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.87 g⊕ (8.53 m/s²), and an escape velocity of 23.9 km/s.
In its orbital architecture around Kepler-495, Kepler-495 b completes one full revolution every 3.413 Earth days at a semi-major axis of 0.0427 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 136.1 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 1200 K (+927°C / +1701°F) and receiving 310.02 S⊕ (~421,939 W/m²), Kepler-495 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-495 is classified as a stellar host with an effective photospheric temperature of 5,346 K, a radius of 0.83 R☉, a mass of 0.86 M☉, an estimated bolometric luminosity of 0.505 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.37 Gyr and a metallicity of [Fe/H] = -0.07 dex (near-solar heavy-element abundance). From Earth, Kepler-495 shines at apparent V-band magnitude 14.942 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-495 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-495 b sharing its stellar neighborhood alongside Kepler-495 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-495 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,346 K |
| Stellar Radius | 0.8300 R☉ |
| Stellar Mass | 0.8600 M☉ |
| Bolometric Luminosity | 0.505 L☉ |
| Metallicity [Fe/H] | -0.070 dex |
| Stellar Age | 4.370 Gyr |
| Apparent Magnitude | V: 14.942 · G: 14.607 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.042700 AU |
| Orbital Period | 3.413 days |
| Mean Orbital Velocity | 136.1 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.7500° |
| Mean Bulk Density | 0.92 g/cm³ (23.9 km/s vesc) |
| Insolation Flux | 310.0210 S⊕ (~421,939 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2149.100 LY (658.924 pc) |