Deep Space 1 (DS1) was launched in October 1998 as part of NASA's New Millennium Program and completed its primary mission testing ion propulsion and 11 other advanced, high-risk technologies in September 1999. The DS1 spacecraft flew past asteroid (9969) Braille at a distance of 26 km in July 1999. The asteroid is elongated and irregularly shaped, with a longest side estimated at 2