TACSAT 4 is a payload in LEO orbit, operated by Naval Research Lab, launched 2011.
Orbital data last updated 8 days ago. This may not reflect the current orbital state, not for operational use or collision avoidance. That number is the age of the measurement itself, not of our last check. We look for newer orbital data every six hours and publish whatever the tracking catalogue has released; when nothing newer has been released, the measurement below stays where it is. This is unusual even for this orbit: only 370 of the 11,736 tracked objects in LEO are this far behind. We do not know the reason. The tracking catalogue simply has not released a newer measurement for this object. This record was last refreshed on 2026-08-15.Why?
See it moving on the 3D globe alongside every other active object, propagated in your browser.
This is one of thousands of catalogued objects, one of many in the LEO band. How many satellites are in orbit right now?
//Orbital data is approximate and not for operational use. Last ingested from CelesTrak on Aug 15, 2026.