ESA And JAXA's Planetary Defense Mission Powers On For The First Time

ESA and JAXA's Rapid Apophis Mission for Space Safety (Ramses) has successfully powered on its computer for the first time, marking a critical milestone in the mission's development. The mission, designed to monitor the Earth's proximity to asteroid 99942 Apophis, has been built in parallel, with the core module assembled in Milan and the propulsion module in Lampoldshausen, Germany. The core module, containing the spacecraft's "brains," was powered on recently, with its Power and Conditioning Distribution Unit (PCDU) and Mass Memory Unit passing individual tests. The propulsion module, featuring a carbon-fiber central structure, is ready to connect to the core module once assembled.

The Ramses mission is on a tight timeline, with construction starting in October 2024 and full contract signed in February 2025, leaving just over three years until the 2029 asteroid flyby. The spacecraft will be combined at ESA’s ESTEC Test Centre in the Netherlands next spring, followed by a series of extreme tests, including a thermal vacuum test, to ensure readiness for launch. The hard stop deadline is spring 2028, when Ramses will launch on a Japanese H-3 rocket. The mission aims to observe the asteroid's flyby, providing valuable data for planetary defense.

The successful power-on of Ramses marks a crucial step in its development, demonstrating the progress made in assembling and testing its components. The mission's rapid construction timeline highlights the urgency of its goals, with the potential to provide critical data on asteroid impacts. The combination of the two modules and subsequent testing will determine whether Ramses can meet its launch deadline and contribute to planetary defense efforts. The success of this milestone underscores the importance of the mission in monitoring a potentially hazardous asteroid and the collaborative effort between ESA and JAXA to ensure readiness for the 2029 event.

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