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.
External links 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