QPS-SAR-11 YAMATSUMI

QPS-SAR-11 YAMATSUMI is an active satellite operated by Japan, launched on 2025-06-11 from RLLC. As a relatively recent addition to the catalogue, its orbital elements are well-characterised. It orbits in Low Earth Orbit (LEO) at altitudes between 556 km and 568 km with an inclination of 42.0°. It travels at approximately 27,297 km/h (7.58 km/s), completing one full orbit every 96 minutes — that’s roughly 15.02 orbits per day. 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 ~3–10 years. Orbital Radar tracks QPS-SAR-11 YAMATSUMI in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

QPS-SAR-11 YAMATSUMI orbits at an average altitude of 562 km in the core of Low Earth Orbit, the most heavily utilised altitude band. The balance of moderate drag (limiting debris accumulation) and short signal path (enabling low-latency links and high-resolution imaging) makes this regime the default for most commercial and government missions. Within ±50 km of QPS-SAR-11 YAMATSUMI’s average altitude, there are currently 3,195 active payloads and 446 tracked debris or rocket body fragments — notable neighbours include STARLINK-1184, STARLINK-1276, ONEWEB-0050. This makes it one of the more crowded altitude bands, containing roughly 18.3% of all active satellites. With an inclination of 42.0°, QPS-SAR-11 YAMATSUMI passes over latitudes between 42.0°N and 42.0°S, covering the tropical and temperate zones where most of the world’s population resides. Low-to-mid inclination orbits are efficient to reach from equatorial and mid-latitude launch sites. Japan operates approximately 189 active satellites in total, of which 37 share a similar altitude band with QPS-SAR-11 YAMATSUMI.