Samba’s fiery farewell recorded

Samba, the third of the four Cluster satellites, reentered Earth's atmosphere on 31 August 2026 at 21:39:38 UTC / 23:39:38 CEST. Its trajectory had been altered by the mission control team in November 2024 to ensure a safe, remote reentry over the South Pacific Ocean, then adjusted again in January 2026 so that a plane full of scientists could fly out from Tonga and observe it. The final prediction of its reentry time and location, combining spacecraft data and telescope observations, proved accurate to the second, reflecting lessons learned from the previous targeted reentries of Salsa and Rumba.

The ROSIE airborne observation team captured the event using a tracking camera, which confirmed Samba's position and provided context such as the state of fragmentation and relative positioning of fragments. Complementing the tracking cameras were instruments looking for specific materials in the same field of view, helping scientists identify which part of the spacecraft was being observed. Data and images were collected by 29 of the 30 instruments on board; processing takes time, and more footage is expected after the Tango reentry, planned for later tonight.

ESA's Stijn Lemmens highlighted the importance of the data for reentry science: better understanding of how satellites heat up, break up, and which materials survive allows engineers to design satellites that burn up completely (design-for-demise), while also preventing atmospheric pollution. He noted how hard such data are to obtain and praised the entire team, from those determining and ensuring Samba's precise trajectory to the ROSIE team that flew out to meet it. The Cluster 'family' said goodbye to Samba at ESOC with mixed feelings, having sent farewell commands.