ESA and JAXA team up on planetary defence, Ramses mission to asteroid Apophis

The European Space Agency and the Japan Aerospace Exploration Agency have signed a Memorandum of Cooperation to deepen collaboration in planetary defence, alongside a dedicated agreement for collaboration on the Rapid Apophis Mission for. The institutional report frames the development in practical terms and ties it to the broader mission or observing effort.

This matters because Earth science becomes stronger when local observations can be placed inside a broader physical pattern that spans time and geography. The planet operates as a coupled system in which atmospheric, oceanic, cryospheric and solid-Earth processes interact across timescales from days to millions of years. A measurement that captures one variable at one location and one moment has limited interpretive value until it is embedded in the longer series and wider spatial coverage that allow natural variability to be separated from forced change. The agreements were signed on 7 May by ESA Director General Josef Aschbacher and JAXA President Hiroshi Yamakawa at the Embassy of Italy in Berlin, Germany, in the presence of. The event was hosted in collaboration with the Italian Space Agency (ASI), in light of ESA’s selection of OHB Italia as prime contractor for the Ramses mission.

The move builds on a joint statement from November 2024, in which ESA and JAXA committed to expanding large-scale cooperation, including on planetary defence. With today’s signatures, ESA and JAXA are moving decisively from shared intention to concrete implementation, translating commitment into mission‑level cooperation.

We sincerely appreciate ESA and its Member States, including Italy, and expect this cooperation to further advance international efforts in this field. As a field of applied scientific research, it brings together the international community to detect and characterise near-Earth objects early, track their trajectories, assess.

The programme’s Near-Earth Object Coordination Centre (NEOCC) monitors asteroid threats and refines orbit predictions, while its space missions oversee the development of rapid. The first major outcome of the new ESA-JAXA cooperation is collaboration on the Ramses mission.

The broader interest lies in linking the observation to climatic, geophysical or environmental dynamics that extend well beyond the immediate event or location. Earth science is unusual in that its most important questions operate on timescales that no single research career can observe directly, making the archival record, whether in ice, sediment, rock or satellite data, as important as any new measurement. Results that can be embedded in that record, and that either confirm or challenge the patterns it reveals, carry disproportionate scientific weight.

Ramses will launch in 2028 and rendezvous with the asteroid (99942) Apophis ahead of its exceptionally rare, close flyby of Earth in April 2029. Roughly 375 metres across, Apophis will pass just 32 000 km above Earth’s surface on Friday 13 April 2029, one tenth the distance to the Moon and closer than satellites in.

Because the account originates with ESA Space News, it functions best as a primary institutional report that is close to the data and operations, not as independent scientific validation. Institutional communications are produced by organizations with legitimate interests in presenting their work in a favorable light, which does not make them unreliable but does make them partial. Details that complicate the narrative, including instrument limitations, unexpected failures and results below projections, tend to be minimized relative to progress messages. Technical documentation and peer-reviewed publications, where they exist, provide the complementary layer that institutional releases cannot substitute.

The next step is to place the result inside longer time series and to compare it with independent instruments and independent sites. Earth system observations gain most of their interpretive power from network density and temporal depth, not from any single measurement however precise. Model simulations that assimilate the new data will help clarify whether the observation fits comfortably within known natural variability or represents a shift that existing models do not reproduce.

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