An Anchored Chemical Propulsion Tug: A Short, High-Thrust Push on a 75-Metre Asteroid

This paper computes an anchored chemical tug that pushes a 75 m asteroid of mass 618,501,054 kg using propellant carried from Earth. At a specific impulse of 322 s the rocket equation requires 5,320.0 kg of propellant, which is 0.00086 percent of the body's mass, to deliver the required 27.2 mm per second for a 6,000 km displacement with five years of warning. At 1,450 N the burn lasts 0.134 days. This is a computed study of a deflection system for planetary defence, with no targeting or weapon application. It is simulated, not measured.