This is a Mercury drogue parachute such as was used on the United States’ first human spacecraft. Manufactured by Radioplane Division of Northrop-Ventura in 1962, it is made largely of nylon and is 2 m (6 ft) in diameter when fully deployed. The drogue parachute deployed to stabilize the spacecraft before the deployment of the main parachute, which lowered the capsule into the water.
The NASA Manned Spacecraft Center transferred this artifact to the Smithsonian.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.