2017 AG13

 is a small Aten asteroid that made a close approach of 0.54 lunar distances from Earth on January 9, 2017. It was the largest asteroid to pass less than 1 lunar distance from Earth since on August 28, 2016. The Catalina Sky Survey observed it first on January 7, 2017, only two days before its closest approach. At its brightest, reached apparent magnitude 12.2. Shortly after, it moved too close to the Sun to be seen by telescopes.

The asteroid frequently makes close approaches to Earth, possibly passing as close as 127000 km to Earth on January 9, 2069, however it will most likely pass much farther away.

Based on an absolute magnitude of 26.1, is likely 15 – across, assuming a typical asteroid albedo of between 0.05 and 0.3.