Earth-Apophis-Earth (EAE)

DSES has discussed the possibility of bouncing signals off the Apophis asteroid similar to what we do now by bouncing signals off the moon. This might be challenging because the Apophis asteroid is small and will be traveling fast, so careful planning will be needed.

What is Apophis?


The 2029 Close Flyby

  • On April 13, 2029, Apophis will make a very close approach to Earth — passing at about 20,000 miles (≈ 32,000 km) from Earth’s surface. NASA Science+3NASA Science+3NASA+3
  • That distance is closer than many geostationary satellites orbiting Earth. NASA Science+2European Space Agency+2
  • At that time, it is expected to be visible to the naked eye in parts of Europe, Africa, and Asia. NASA+2Space+2
  • Because of Earth’s gravitational pull during the flyby, the asteroid’s orbit, rotation period, and surface features may be altered (e.g. landslides, surface shifts). NASA Science+2science.gsfc.nasa.gov+2

NASA’s Mission: OSIRIS-APEX

To study these changes, NASA is planning a mission extension:


Other Missions & Plans

  • The European Space Agency (ESA), in collaboration with Japan, is working on a proposed mission called RAMSES (Rapid Apophis Mission for Space Safety). Wikipedia+2Space+2
    • RAMSES, if approved, would launch around 2028 and arrive at Apophis around February 2029 (i.e. just before the flyby) to monitor Apophis before, during, and after the Earth passage. Wikipedia+2Space+2
    • It plans to deploy CubeSats and gather data on how Apophis responds to gravitational stress from Earth. Wikipedia
    • Japan has committed to supplying an H3 rocket for the mission. Reuters+1
  • There is also talk of repurposing already-built but shelved spacecraft (from NASA) to assist observations of Apophis. Space

If you like, I can break down the mission timeline, instruments, anticipated scientific findings, or the risks and challenges. Which part would you like to dive into?

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