SENTINEL-3B is a payload in SSO orbit, operated by European Commission DG-GROW Directorate I/2, Copernicus Unit / European Space Agency, launched 2018.
It went up on launch 2018-039, alongside everything else on that flight
See it moving on the 3D globe alongside every other active object, propagated in your browser.
How many satellites are in orbit right now?
//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Oct 22, 2026.