NUSAT-37 (JOAN CLARKE)

NUSAT-37 (JOAN CLARKE) is an active satellite operated by Satellogic S.A. (Argentina), launched on 2023-04-15 from Vandenberg SFB, California on the Transporter-7 launch. It orbits in Low Earth Orbit (LEO) at altitudes between 391 km and 397 km with an inclination of 97.3°. It travels at approximately 27,634 km/h (7.68 km/s), completing one full orbit every 92 minutes — that’s roughly 15.58 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. Its near-circular orbit (eccentricity close to zero) means it maintains a very consistent altitude throughout each revolution. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is months to ~1 year. Orbital Radar tracks NUSAT-37 (JOAN CLARKE) in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

NUSAT-37 (JOAN CLARKE) orbits at an average altitude of 394 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 NUSAT-37 (JOAN CLARKE)’s average altitude, there are currently 1,306 active payloads and 84 tracked debris or rocket body fragments — notable neighbours include STARLINK-1008, STARLINK-1012, STARLINK-1020. This makes it one of the more crowded altitude bands, containing roughly 7.5% of all active satellites. With an inclination of 97.3°, NUSAT-37 (JOAN CLARKE) passes over latitudes between 97.3°N and 97.3°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, of which 5 share a similar altitude band with NUSAT-37 (JOAN CLARKE).