LEO 1

LEO 1 is an active satellite operated by Telesat Canada Ltd. (BCE, Inc.) (United States), launched on 2018-01-12 from SRI. It orbits in Low Earth Orbit (LEO) at altitudes between 421 km and 916 km with an inclination of 99.2°. It travels at approximately 27,089 km/h (7.52 km/s), completing one full orbit every 98 minutes — that’s roughly 14.68 orbits per day. Its near-polar, sun-synchronous orbit means it passes over any given point on Earth at approximately the same local solar time, ideal for consistent Earth observation lighting conditions. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~10–25 years. Orbital Radar tracks LEO 1 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

LEO 1 orbits at an average altitude of 669 km in a sun-synchronous orbit (SSO), a specialised subset of LEO where the orbital plane precesses to maintain a constant angle relative to the Sun. This provides consistent lighting conditions on every pass — essential for Earth observation, weather monitoring and environmental science. Within ±50 km of LEO 1’s average altitude, there are currently 598 active payloads and 1,198 tracked debris or rocket body fragments — notable neighbours include TERRA, AQUA, LANDSAT 9. With an inclination of 99.2°, LEO 1 passes over latitudes between 99.2°N and 99.2°S, providing near-global coverage including the polar regions. Polar and near-polar orbits are used for reconnaissance, weather monitoring and Earth-observation missions that need to image every part of the planet. United States operates approximately 12,339 active satellites in total, of which 274 share a similar altitude band with LEO 1.