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

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24179992): 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. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.