Kepler-695 b
Astrophysical Synthesis & Habitability Characterization
Kepler-695 b is a confirmed gas giant exoplanet orbiting the star Kepler-695, located approximately 2749.3 light-years (842.95 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 1.114% across the stellar disk), this world measures 9.21 Earth radii (0.82 Jupiter radii) and has a measured mass of 62.3 Earth masses (0.2 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.44 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 0.73 g⊕ (7.16 m/s²), and an escape velocity of 29.1 km/s.
In its orbital architecture around Kepler-695, Kepler-695 b completes one full revolution every 3.04 Earth days at a semi-major axis of 0.0374 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 133.8 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 1021 K (+748°C / +1378°F) and receiving 499.06 S⊕ (~679,226 W/m²), Kepler-695 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-695 is classified as a stellar host with an effective photospheric temperature of 5,181 K, a radius of 0.8 R☉, a mass of 0.84 M☉, an estimated bolometric luminosity of 0.414 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.47 Gyr and a metallicity of [Fe/H] = -0.01 dex (near-solar heavy-element abundance). From Earth, Kepler-695 shines at apparent V-band magnitude 15.262 (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-695 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,181 K |
| Stellar Radius | 0.8000 R☉ |
| Stellar Mass | 0.8400 M☉ |
| Bolometric Luminosity | 0.414 L☉ |
| Metallicity [Fe/H] | -0.010 dex |
| Stellar Age | 4.470 Gyr |
| Apparent Magnitude | V: 15.262 · G: 15.113 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.037400 AU |
| Orbital Period | 3.04 days |
| Mean Orbital Velocity | 133.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 85.9500° |
| Mean Bulk Density | 0.44 g/cm³ (29.1 km/s vesc) |
| Insolation Flux | 499.0640 S⊕ (~679,226 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2749.300 LY (842.947 pc) |