{
    "id": "TEST_FROZEN", "name": "Frostheim", "body_type": "planet",
    "planet_class": "frozen", "body_scale": "planet", "seed": 33345,
    "star": {"type": "K", "luminosity_solar": 0.4, "color_temp_K": 4500},
    "orbit": {"distance_au": 1.8, "period_days": 1100, "axial_tilt_deg": 8.0},
    "physical": {"gravity_g": 0.78, "oblateness": 0.002, "atmosphere": "standard", "atmosphere_color": [0.6, 0.7, 1.0]},
    "terrain": {"land_fraction": 0.55, "polar_ice_lat": 0.40, "tectonics": "low", "max_elevation_km": 5.0},
    "environment": {"geothermal_flux": "low", "uv_index": "low", "substrate": "silicate", "chemosynthetic": false, "hydrosphere": "ice"},
    "clouds": {"enabled": true, "coverage_base": 0.30},
    "render": {"globe_light_angle_deg": 140, "specular_ocean": true, "night_side_ambient": 0.018}
}