KMT-2024-BLG-0404L b
Astrophysical Synthesis & Habitability Characterization
KMT-2024-BLG-0404L b is a confirmed gas giant exoplanet orbiting the star KMT-2024-BLG-0404L, located approximately 23515.8 light-years (7210 parsecs) from the Solar System. First announced in 2025 by KMTNet using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 11.9 Earth radii (1.06 Jupiter radii) and has a measured mass of 8657.646 Earth masses (27.24 Jupiter masses). Combining its mass and radius yields a mean bulk density of 28.33 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 61.14 g⊕ (599.58 m/s²), and an escape velocity of 301.7 km/s.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 11.900 R⊕, KMT-2024-BLG-0404L b exceeds the empirical ~1.8–2.2 R⊕ Fulton radius valley threshold, indicating a substantial hydrogen-helium or supercritical volatile envelope without a conventional solid terrestrial surface.
The host star KMT-2024-BLG-0404L is classified as a low-mass red dwarf of spectral type M with a mass of 0.09 M☉. The KMT-2024-BLG-0404L system is a multi-planet architecture hosting 2 confirmed worlds, with KMT-2024-BLG-0404L b sharing its stellar neighborhood alongside KMT-2024-BLG-0404L 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: KMTNet · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | KMT-2024-BLG-0404L |
| Spectral Type | M |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.0900 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.850000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 28.33 g/cm³ (301.7 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 23515.800 LY (7210.000 pc) |