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Story summary
- The asteroid 1997 NC1 will pass within 1.6 million miles of Earth on Saturday morning, posing no danger.
- Amateur astronomers can spot the rock with binoculars, creating a public sky-watching event.
- The space rock measures between 2,461 feet and 5,413 feet, comparable to two to four Empire State Buildings.
- NASA, the European Space Agency and other agencies continue to monitor the object after its discovery three decades ago by a tracking system in Hawaii.
