TIROS 8 DEB

TIROS 8 DEB is a tracked piece of space debris attributed to United States, launched on 1963-12-21 from Vandenberg SFB, California on the Tiros H launch. After more than 63 years in orbit, it is one of the longest-surviving objects in the space catalogue. It orbits in Low Earth Orbit (LEO) at altitudes between 506 km and 535 km with an inclination of 58.5°. It travels at approximately 27,379 km/h (7.61 km/s), completing one full orbit every 95 minutes — that’s roughly 15.15 orbits per day. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~3–10 years. As orbital debris, TIROS 8 DEB poses a potential collision risk to operational satellites in nearby orbits and is continuously monitored by the U.S. Space Surveillance Network and other tracking systems.

TIROS 8 DEB orbits at an average altitude of 521 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 TIROS 8 DEB’s average altitude, there are currently 7,450 active payloads and 273 tracked debris or rocket body fragments — notable neighbours include STARLINK-1039, STARLINK-1184, STARLINK-1231. This makes it one of the more crowded altitude bands, containing roughly 42.7% of all active satellites. With an inclination of 58.5°, TIROS 8 DEB passes over latitudes between 58.5°N and 58.5°S, covering most populated land masses in both hemispheres. This mid-inclination band balances global coverage with efficient launch energy requirements. United States operates approximately 12,358 active satellites in total, of which 6,785 share a similar altitude band with TIROS 8 DEB.