2M0437 b
Astrophysical Synthesis & Habitability Characterization
2M0437 b is a confirmed gas giant exoplanet orbiting the star 2MASS J04372171+2651014, located approximately 419.1 light-years (128.48 parsecs) from the Solar System. First announced in 2021 by Subaru Telescope using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 13 Earth radii (1.16 Jupiter radii) and has a measured mass of 1271.314 Earth masses (4 Jupiter masses). Combining its mass and radius yields a mean bulk density of 3.19 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 7.52 g⊕ (73.75 m/s²), and an escape velocity of 110.6 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1450 K (+1177°C / +2151°F), 2M0437 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star 2MASS J04372171+2651014 is classified as a low-mass red dwarf of spectral type M V with an effective photospheric temperature of 3,100 K, a radius of 0.84 R☉, a mass of 0.17 M☉, an estimated bolometric luminosity of 0.058 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.003 Gyr and a metallicity of [Fe/H] = 0.01 dex (near-solar heavy-element abundance). From Earth, 2MASS J04372171+2651014 shines at apparent V-band magnitude 16.186 (faint and requiring research-grade or CCD telescopic photometry) in the Northern 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: Subaru Telescope · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | 2MASS J04372171+2651014 |
| Spectral Type | M V |
| Effective Temp (Teff) | 3,100 K |
| Stellar Radius | 0.8400 R☉ |
| Stellar Mass | 0.1700 M☉ |
| Bolometric Luminosity | 0.058 L☉ |
| Metallicity [Fe/H] | 0.010 dex |
| Stellar Age | 0.003 Gyr |
| Apparent Magnitude | V: 16.186 · G: 14.337 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 118.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 3.19 g/cm³ (110.6 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 419.100 LY (128.484 pc) |