Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-05-12
ChinChin. J. Astron. Astrophys. Vol. 8 (2008), Suppl
Astronomy and Astrophysics
Astrophysics
14 pages, 5 figures; editorial corrections and answer to referee open questions on project time scale
Scientific paper
To deflect impact-trajectory of massive km^3 and spinning asteroid by a few terrestrial radius one need a large momentum exchange. The dragging of huge spinning bodies in space by external engine seems difficult or impossible. Our solution is based on the landing of multi screw-rockets, powered by mini-nuclear engines, on the body, that dig a small fraction of the soil surface, to use as an exhaust propeller, ejecting it vertically in phase among themselves. Such a mass ejection increases the momentum exchange, their number redundancy guarantees the stability of the system. The slow landing (below 40 cm s^-1) of each engine-unity at those lowest gravity field, may be achieved by save rolling and bouncing along the surface. The engine array tuned activity, overcomes the asteroid angular velocity. Coherent turning of the jet heads increases the deflection efficiency. A procession along its surface may compensate at best the asteroid spin. A small skin-mass (about 2 10^4 tons) may be ejected by mini nuclear engines. Such prototypes may also build first save galleries for humans on the Moon. Conclusive deflecting tests might be performed on remote asteroids. The incoming asteroid 99942 Apophis (just 2% of km^3) may be deflected safely a few Earth radius. How to tag its trajectory is described. Its encounter maybe not just a hazard but an opportunity, learning how to land, dig, build and also to nest save human station inside. Asteroids amplified deflections by gravity swing maybe driven into longest planetary journeys. Mars journey may benefict by Phobos natural asteroid parking and fueling role.
No associations
LandOfFree
Asteroid Deflection: How, where and when? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Asteroid Deflection: How, where and when?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asteroid Deflection: How, where and when? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-457896