ARIANE 1 R/B

ARIANE 1 R/B is a spent rocket body associated with France, launched on 1986-02-22 from Guiana Space Centre, Kourou on the SPOT launch. With over 40 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 772 km and 789 km with an inclination of 98.2°. It travels at approximately 26,877 km/h (7.47 km/s), completing one full orbit every 100 minutes — that’s roughly 14.33 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. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~25–100 years. Spent rocket bodies like ARIANE 1 R/B are among the largest pieces of uncontrolled space debris and are priority targets for collision avoidance manoeuvres and future active debris removal efforts.

ARIANE 1 R/B orbits at an average altitude of 781 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 ARIANE 1 R/B’s average altitude, there are currently 422 active payloads and 2,214 tracked debris or rocket body fragments — notable neighbours include NOAA 20, ONEWEB-0179, ONEWEB-0455. With an inclination of 98.2°, ARIANE 1 R/B passes over latitudes between 98.2°N and 98.2°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. France operates approximately 115 active satellites in total, of which 3 share a similar altitude band with ARIANE 1 R/B.