K2-377 b
Astrophysical Synthesis & Habitability Characterization
K2-377 b is a confirmed super-earth exoplanet orbiting the star K2-377, located approximately 636.5 light-years (195.15 parsecs) from the Solar System. First announced in 2022 by K2 using the Transit detection technique (producing an estimated primary transit depth of 0.0505% across the stellar disk), this world measures 1.693 Earth radii and has a measured mass of 3.51 Earth masses. Combining its mass and radius yields a mean bulk density of 3.99 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.22 g⊕ (11.96 m/s²), and an escape velocity of 16.1 km/s.
In its orbital architecture around K2-377, K2-377 b completes one full revolution every 12.832 Earth days.
ℹ️ Thermal & Atmospheric Regime: Current photometric and spectroscopic constraints for K2-377 b place it outside the conservative habitable zone definition pending further atmospheric characterization.
The host star K2-377 is classified as a stellar host with an effective photospheric temperature of 4,200 K, a radius of 0.691 R☉, a mass of 0.821 M☉, an estimated bolometric luminosity of 0.133 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.008 dex (near-solar heavy-element abundance). From Earth, K2-377 shines at apparent V-band magnitude 14.107 (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 | K2-377 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,200 K |
| Stellar Radius | 0.6910 R☉ |
| Stellar Mass | 0.8210 M☉ |
| Bolometric Luminosity | 0.133 L☉ |
| Metallicity [Fe/H] | -0.008 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 14.107 · G: 13.586 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 12.832 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 3.99 g/cm³ (16.1 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 636.500 LY (195.149 pc) |