Kumar Ramohalli’s Space Janitor

Facts about the Autonomous Space Processor for Orbital Debris:

Dimensions: Open framework 6-by-6-by-4 meters, with a storage bin beneath capable of holding 30,000 pounds.

Construction: Plastic-like composite, with gold-plated mirrors for solar power.

Equipment: On-board computer, sensors to detect debris and determine whether satellites still contain dangerous fuel, two robot arms with pincers, solar-powered cutting torch.

Deployment: Carried aloft by space shuttle or rocket booster, could operate two years in stationary orbit, intercepting passing debris. Could operate one month if it used maneuvering fuel to chase down objects. Designer envisions a fleet of 12 in operation.

Retrieval: Bin could be emptied by shuttle. Satellite could be programmed to either re-enter the atmosphere and burn up or splash down in the ocean for recovery.

Cost: Estimated $5 million for satellite, $15 million to build and launch. Price would decrease if more units are built.

Developer: Kumar Ramohalli, professor of aerospace and mechanical engineering at the University of Arizona in Tucson, formerly of NASA’s Jet Propulsion Laboratory. Developed device since 1988 with the help of students and a $17,500 annual grant that ended in 1994 from the Universities Space Research Assn. Advanced Design Program. Device patented and a one-third scale prototype built.