JUQ-154: Unlocking Practical Insights from a Compact Model Number
The host star, a K3 V dwarf with an effective temperature of 4 840 K and a luminosity of 0.44 L⊙, positions its conservative habitable zone between 0.44 AU and 0.78 AU (Kopparapu et al., 2014). JUQ‑154’s semi‑major axis of 0.61 AU places it comfortably within this range, receiving an insolation flux of 0.97 S⊕—essentially Earth‑like. JUQ-154
The RV solution indicates an eccentricity of e = 0.04 ± 0.01, implying only modest seasonal variations. Dynamical simulations (N‑body integrations spanning 10⁸ yr) show the orbit is dynamically stable, with no resonant perturbations from the distant companion star (a M‑type dwarf at 210 AU) or any detected interior planets. JUQ-154: Unlocking Practical Insights from a Compact Model
The simultaneous detection of O₃ and CH₄ at mixing ratios of 10⁻⁶ and 10⁻⁸, respectively, places JUQ‑154 in the “potentially habitable” region of the biosignature diagram (Seager et al., 2016). While abiotic pathways can generate these gases, the observed ratio (O₃/CH₄ ≈ 100) is difficult to reconcile with known non‑biological mechanisms, warranting further scrutiny. warranting further scrutiny.