K2-162 b
Astrophysical Synthesis & Habitability Characterization
K2-162 b is a confirmed super-earth exoplanet orbiting the star K2-162, located approximately 405.8 light-years (124.43 parsecs) from the Solar System. First announced in 2018 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0366% across the stellar disk), this world measures 1.44 Earth radii and has a measured mass of 2.67 Earth masses. Combining its mass and radius yields a mean bulk density of 4.93 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.29 g⊕ (12.65 m/s²), and an escape velocity of 15.2 km/s.
In its orbital architecture around K2-162, K2-162 b completes one full revolution every 9.459 Earth days at a semi-major axis of 0.0795 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 91.4 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 631 K (+358°C / +676°F) and receiving 34.86 S⊕ (~47,447 W/m²), K2-162 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star K2-162 is classified as a stellar host with an effective photospheric temperature of 4,842 K, a radius of 0.69 R☉, a mass of 0.75 M☉, an estimated bolometric luminosity of 0.235 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.17 dex (metal-poor relative to the Sun). From Earth, K2-162 shines at apparent V-band magnitude 12.278 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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: K2 · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | K2-162 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,842 K |
| Stellar Radius | 0.6900 R☉ |
| Stellar Mass | 0.7500 M☉ |
| Bolometric Luminosity | 0.235 L☉ |
| Metallicity [Fe/H] | -0.170 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 12.278 · G: 11.966 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.079500 AU |
| Orbital Period | 9.459 days |
| Mean Orbital Velocity | 91.4 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.7612° |
| Mean Bulk Density | 4.93 g/cm³ (15.2 km/s vesc) |
| Insolation Flux | 34.8621 S⊕ (~47,447 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 405.800 LY (124.433 pc) |