{"name":"Saturn","designation":null,"input_date":"2026-10-10","x_au":9.249829973128437,"y_au":1.8274985299269007,"z_au":-0.39967116970920724,"distance_from_sun_au":9.437099260501974,"true_anomaly_deg":278.13301263585254,"eccentric_anomaly_deg":281.177917300386,"mean_anomaly_deg":284.20542793994366,"jd":2461323.5,"frame":"ecliptic J2000, heliocentric, two-body propagation","accuracy_note":"Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision."}