2018 UA is a small near-Earth Apollo asteroid that flew very close to the Earth on 19 October 2018. It was discovered about 90 minutes before closest approach. After A106fgF, it was probably the second closest non-impacting approach of an asteroid in 2018.

• Asteroid 2018 UA flew past Earth at 0.04 LD, 4th closest on record
• Truck-size asteroid makes fourth-closest pass by Earth on record
• Small asteroid passed closer than TV satellites
• MPEC 2018-U19 : 2018 UA Minor Planet Center
• 2018 UA at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2018 UA at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2018 UA at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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