Kepler-190 b
Astrophysical Synthesis & Habitability Characterization
Kepler-190 b is a confirmed super-earth exoplanet orbiting the star Kepler-190, located approximately 1413.5 light-years (433.39 parsecs) from the Solar System. First announced in 2014 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0324% across the stellar disk), this world measures 1.56 Earth radii and has a measured mass of 3.05 Earth masses. Combining its mass and radius yields a mean bulk density of 4.43 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.25 g⊕ (12.26 m/s²), and an escape velocity of 15.6 km/s.
In its orbital architecture around Kepler-190, Kepler-190 b completes one full revolution every 2.02 Earth days at a semi-major axis of 0.03 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 161.6 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 1166 K (+893°C / +1639°F) and receiving 417.24 S⊕ (~567,861 W/m²), Kepler-190 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-190 is classified as a stellar host with an effective photospheric temperature of 5,106 K, a radius of 0.795 R☉, a mass of 0.834 M☉, an estimated bolometric luminosity of 0.385 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.48 Gyr and a metallicity of [Fe/H] = 0.06 dex (metal-rich relative to the Sun). From Earth, Kepler-190 shines at apparent V-band magnitude 14.336 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-190 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-190 b sharing its stellar neighborhood alongside Kepler-190 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-190 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,106 K |
| Stellar Radius | 0.7950 R☉ |
| Stellar Mass | 0.8340 M☉ |
| Bolometric Luminosity | 0.385 L☉ |
| Metallicity [Fe/H] | 0.060 dex |
| Stellar Age | 1.480 Gyr |
| Apparent Magnitude | V: 14.336 · G: 14.118 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.030000 AU |
| Orbital Period | 2.02 days |
| Mean Orbital Velocity | 161.6 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 86.2000° |
| Mean Bulk Density | 4.43 g/cm³ (15.6 km/s vesc) |
| Insolation Flux | 417.2380 S⊕ (~567,861 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1413.500 LY (433.387 pc) |