digitS'
Garden Master
"... the April 19 encounter is the closest this asteroid has come to Earth for at least 400 years and will be its closest approach for at least the next 500 years."
http://earthsky.org/astronomy-essentials/large-asteroid-2014-jo25-close-april-19-2017-how-to-see
Steve
http://earthsky.org/astronomy-essentials/large-asteroid-2014-jo25-close-april-19-2017-how-to-see
Steve