{"body":{"catalogueNumber":6206,"name":"COSMOS 521","class":"payload","military":true,"massKg":643,"geostationary":false,"orbitClass":"LEO","gcatName":"Kosmos-521","operator":{"code":"PKO","name":"Space Defence Force, USSR Armed Forces"},"state":{"code":"SU","name":"Union of Soviet Socialist Republics"},"manufacturer":{"code":"YUZH","name":"Southern State Design Bureau"},"operating":"ended","launchDate":"1972-09-29"},"source":{"type":"elements","epoch":"2026-11-08T05:20:56.845Z","ageSeconds":48043},"elements":{"OBJECT_NAME":"COSMOS 521","OBJECT_ID":"1972-074A","EPOCH":"2026-11-08T05:20:56.845824","MEAN_MOTION":13.7251266,"ECCENTRICITY":0.00156961,"INCLINATION":65.8276,"RA_OF_ASC_NODE":288.5951,"ARG_OF_PERICENTER":317.111,"MEAN_ANOMALY":54.1372,"EPHEMERIS_TYPE":0,"CLASSIFICATION_TYPE":"U","NORAD_CAT_ID":6206,"ELEMENT_SET_NO":999,"REV_AT_EPOCH":71138,"BSTAR":-0.000008181341,"MEAN_MOTION_DOT":-8.8e-7,"MEAN_MOTION_DDOT":0}}