K2-407 b
Astrophysical Synthesis & Habitability Characterization
K2-407 b is a confirmed super-earth exoplanet orbiting the star K2-407, located approximately 712.2 light-years (218.38 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0161% across the stellar disk), this world measures 1.283 Earth radii and has a measured mass of 2.19 Earth masses. Combining its mass and radius yields a mean bulk density of 5.72 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.33 g⊕ (13.04 m/s²), and an escape velocity of 14.6 km/s.
In its orbital architecture around K2-407, K2-407 b completes one full revolution every 4.942 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for K2-407 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-407 is classified as a solar-type yellow star of spectral type G4 with an effective photospheric temperature of 5,563 K, a radius of 0.927 R☉, a mass of 0.881 M☉, an estimated bolometric luminosity of 0.738 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.014 dex (near-solar heavy-element abundance). From Earth, K2-407 shines at apparent V-band magnitude 11.969 (faint and requiring research-grade or CCD telescopic photometry) in the Southern celestial hemisphere. The K2-407 system is a multi-planet architecture hosting 2 confirmed worlds, with K2-407 b sharing its stellar neighborhood alongside K2-407 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: K2 · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | K2-407 |
| Spectral Type | G4 |
| Effective Temp (Teff) | 5,563 K |
| Stellar Radius | 0.9270 R☉ |
| Stellar Mass | 0.8810 M☉ |
| Bolometric Luminosity | 0.738 L☉ |
| Metallicity [Fe/H] | 0.014 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 11.969 · G: 11.996 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 4.942 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 5.72 g/cm³ (14.6 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 712.200 LY (218.376 pc) |