EXPLORER 11
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About This Satellite
EXPLORER 11 is a cataloged satellite tracked under NORAD ID 107 with international designator 61013A. According to the GCAT master catalog, it was built by MSFC, on the S-15 platform, with a launch mass of about 40 kg, with a shape described as Step Cyl. According to the TLE snapshot used when this page was generated (2026-08-18), its LEO orbit had an apogee of about 1.178 km and a perigee near 470 km, with an inclination of 28.78° and a period of roughly 101.2 minutes; at apogee its speed was about 7.09 km/s. Positions on this page are near-real-time SGP4 predictions propagated from the latest two-line element (TLE) data.
In the TLE snapshot used to generate this page, EXPLORER 11's apogee was 1.178 km, where its speed was about 7.09 km/s, completing about 14.2 orbits of Earth per day. Track it live on the map above or in the JOT orbital map.