This optical composite image shows asteroid 2017 YE5, taken on June 30, 2018, by the Cadi Ayyad University Morocco Oukaimeden Sky Survey, one of the first surveys to identify 2017 YE5 in December 2017. https://photojournal.jpl.nasa.gov/catalog/PIA22558

Artist's illustration of the trajectory of asteroid 2017 YE5 through the solar system. At its closest approach to Earth, the asteroid came to within 16 times the distance between Earth and the moon. A movie is available at https://photojournal.jpl.nasa.gov/catalog/PIA22560

Artist's concept of what binary asteroid 2017 YE5 might look like. The two objects showed striking differences in radar reflectivity, which could indicate that they have different surface properties. A movie is available at https://photojournal.jpl.nasa.gov/catalog/PIA22556

Radar images of the binary asteroid 2017 YE5 from NASA's Goldstone Solar System Radar (GSSR). The observations, conducted on June 23, 2018, show two lobes, but do not yet show two separate objects. A movie is available at https://photojournal.jpl.nasa.gov/catalog/PIA22557

Bi-static radar images of the binary asteroid 2017 YE5 from the Arecibo Observatory and the Green Bank Observatory on June 25. The observations show that the asteroid consists of two separate objects in orbit around each other. A movie is available at https://photojournal.jpl.nasa.gov/catalog/PIA22559