OSCAR 19 (LUSAT)

OSCAR 19 (LUSAT) is an active satellite operated by Argentina, launched on 1990-01-22 from Guiana Space Centre, Kourou. With over 36 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 770 km and 786 km with an inclination of 98.9°. It travels at approximately 26,881 km/h (7.47 km/s), completing one full orbit every 100 minutes — that’s roughly 14.34 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 ~25–100 years. Orbital Radar tracks OSCAR 19 (LUSAT) in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

OSCAR 19 (LUSAT) orbits at an average altitude of 778 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 OSCAR 19 (LUSAT)’s average altitude, there are currently 417 active payloads and 2,162 tracked debris or rocket body fragments — notable neighbours include NOAA 20, ONEWEB-0179, ONEWEB-0455. With an inclination of 98.9°, OSCAR 19 (LUSAT) passes over latitudes between 98.9°N and 98.9°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. Argentina operates approximately 34 active satellites in total.