DH Tau b
Astrophysical Synthesis & Habitability Characterization
DH Tau b is a confirmed gas giant exoplanet orbiting the star DH Tau, located approximately 439.8 light-years (134.85 parsecs) from the Solar System. First announced in 2004 by Subaru Telescope using the Imaging detection technique (resolved directly via high-contrast coronagraphic or interferometric imaging), this world measures 30.264 Earth radii (2.7 Jupiter radii) and has a measured mass of 3496 Earth masses (11 Jupiter masses). Combining its mass and radius yields a mean bulk density of 0.7 g/cm³ (a low bulk density dominated by an extended hydrogen-helium gaseous envelope), a surface gravity of 3.82 g⊕ (37.46 m/s²), and an escape velocity of 120.2 km/s.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 2200 K (+1927°C / +3501°F), DH Tau b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star DH Tau is classified as a low-mass red dwarf of spectral type M0.5 with an effective photospheric temperature of 4,371 K, a radius of 0.27 R☉, a mass of 0.33 M☉, an estimated bolometric luminosity of 0.024 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.001 Gyr. From Earth, DH Tau shines at apparent V-band magnitude 13.98 (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 | DH Tau |
| Spectral Type | M0.5 |
| Effective Temp (Teff) | 4,371 K |
| Stellar Radius | 0.2700 R☉ |
| Stellar Mass | 0.3300 M☉ |
| Bolometric Luminosity | 0.024 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | 0.001 Gyr |
| Apparent Magnitude | V: 13.980 · G: 12.496 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 330.000000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 0.7 g/cm³ (120.2 km/s vesc) |
| Insolation Flux | 0.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 439.800 LY (134.846 pc) |