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3 votes
1 answer
92 views

Puzzler: Why higher solar phase angle (SPA) allows for many more feasible FastKD (kinetic deflection) communications satellite “hijacking” missions?

Space.com's advert-laden Repurposed communications satellites could help save humanity from an asteroid impact ends with: The study results were presented at the Planetary Defence (sic) Conference ...
uhoh's user avatar
  • 149k
6 votes
1 answer
638 views

Understanding gravitational keyhole analysis for Near-Earth Objects

I've been studying the resonant return and gravitational keyhole analysis for NEOs and using the extension of Öpik's theory of close encounters (aka Öpik-Valsecchi theory, Valsecchi et al., Astron ...
Astroynamicist's user avatar
6 votes
2 answers
1k views

Extinction asteroid (10-100 km) impact avoidance

With the present "state-of-the-art" of space technology what is possible to do to avoid an Earth impact by rocky bodies 10 km to 100 km in diameter? Is there any international project to develop a ...
Pedro Paulo Pereira Jr.'s user avatar