OGLE-2017-BLG-1099L b
Astrophysical Synthesis & Habitability Characterization
OGLE-2017-BLG-1099L b is a confirmed gas giant exoplanet orbiting the star OGLE-2017-BLG-1099L, located approximately 23646.3 light-years (7250 parsecs) from the Solar System. First announced in 2021 by OGLE using the Microlensing detection technique (detected via relativistic gravitational lensing of a background source star), this world measures 13.1 Earth radii (1.17 Jupiter radii) and has a measured mass of 959.842 Earth masses (3.02 Jupiter masses). Combining its mass and radius yields a mean bulk density of 2.35 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 5.59 g⊕ (54.82 m/s²), and an escape velocity of 95.8 km/s.
☁️ Atmospheric Regime (Volatile / Gas Envelope): With a radius of 13.100 R⊕, OGLE-2017-BLG-1099L 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 OGLE-2017-BLG-1099L is classified as a stellar host with a mass of 0.45 M☉.
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: OGLE · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | OGLE-2017-BLG-1099L |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | — |
| Stellar Radius | — |
| Stellar Mass | 0.4500 M☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | — |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2.730000 AU |
| Orbital Period | — |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 2.35 g/cm³ (95.8 km/s vesc) |
| Insolation Flux | — |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 23646.300 LY (7250.000 pc) |