BD-13 2130 b
Astrophysical Synthesis & Habitability Characterization
BD-13 2130 b is a confirmed gas giant exoplanet orbiting the star BD-13 2130, located approximately 3017.6 light-years (925.21 parsecs) from the Solar System. First announced in 2007 by La Silla Observatory using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 12.5 Earth radii (1.12 Jupiter radii) and has a measured mass of 3108.377 Earth masses (9.78 Jupiter masses). Combining its mass and radius yields a mean bulk density of 8.78 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 19.89 g⊕ (195.05 m/s²), and an escape velocity of 176.4 km/s.
In its orbital architecture around BD-13 2130, BD-13 2130 b completes one full revolution every 714.3 Earth days (1.96Julian years) at a semi-major axis of 1.66 AU (corresponding to the middle-system regime between Mars at 1.52 AU and Jupiter at 5.20 AU). Its mean orbital velocity is approximately 25.3 km/s (compared to Earth's 29.8 km/s). Its moderate orbital eccentricity of e = 0.21 carries the world between 1.3114 AU at periapsis and 2.0086 AU at apoapsis, driving measurable seasonal insolation cycles.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 745 K (+472°C / +882°F) and receiving 40.04 S⊕ (~54,491 W/m²), BD-13 2130 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star BD-13 2130 is classified as a solar-type yellow star of spectral type G5 IV/V with an effective photospheric temperature of 4,545 K, a radius of 19.17 R☉, a mass of 2.12 M☉, an estimated bolometric luminosity of 140.692 L☉. Stellar evolution modeling indicates an estimated stellar age of 0.74 Gyr and a metallicity of [Fe/H] = -0.08 dex (near-solar heavy-element abundance). From Earth, BD-13 2130 shines at apparent V-band magnitude 10.038 (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: La Silla Observatory · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | BD-13 2130 |
| Spectral Type | G5 IV/V |
| Effective Temp (Teff) | 4,545 K |
| Stellar Radius | 19.1700 R☉ |
| Stellar Mass | 2.1200 M☉ |
| Bolometric Luminosity | 140.692 L☉ |
| Metallicity [Fe/H] | -0.080 dex |
| Stellar Age | 0.740 Gyr |
| Apparent Magnitude | V: 10.038 · G: 9.700 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 1.660000 AU |
| Orbital Period | 714.3 days |
| Mean Orbital Velocity | 25.3 km/s |
| Orbital Eccentricity (e) | 0.21000 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 8.78 g/cm³ (176.4 km/s vesc) |
| Insolation Flux | 40.0372 S⊕ (~54,491 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3017.600 LY (925.214 pc) |