Comet Scanned by NASA Radar
These radar images of comet P/2016 BA14 were taken on March 22, 2016, by scientists using an antenna of NASA's Deep Space Network at Goldstone, California. At the time, the comet was about 2.2 million miles (3.6 million kilometers) from Earth.
Radar images and data from the flyby indicated that the comet is about 3,000 feet (1 kilometer) in diameter.
More information from NASA's Infrared Telescope Facility (IRTF) on Mauna Kea, Hawaii observations of comet P/2016 BA14 is available at http://www.psi.edu/news/darkcomet2.
More information about the Deep Space Network is at http://deepspace.jpl.nasa.gov/dsn.