2017 AG13

2017 AG₁₃ is a small Aten asteroid that made a close approach of 0.54 lunar distances from Earth on January 9, 2017.^[4] It was the largest asteroid to pass less than 1 lunar distance from Earth since 2016 QA₂ 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, 2017 AG₁₃ reached apparent magnitude 12.2.^[1][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 127,000 kilometres (79,000 mi) to Earth on January 9, 2069, however it will most likely pass much farther away.^[2][5]

Based on an absolute magnitude of 26.1, 2017 AG₁₃ is likely 15–36 metres (49–118 feet) across, assuming a typical asteroid albedo of between 0.05 and 0.3.^[3]

• Minor Planet Center flyby diagram
• Newfound Asteroid Gives Earth a Close Shave (space.com)
• Asteroid 2017 AG13 passed between the Earth and Moon and we hardly noticed, redorbit.com, April 17, 2018
• 2017 AG13 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2017 AG13 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2017 AG13 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters