| Minorplanet: | yes |
| 2018 UA | |
| Background: |
|
| Discovered: | 19 October 2018 |
| Mpc Name: | 2018 UA |
| Perihelion: | 0.768136 AU |
| Semimajor: | 1.38933 AU |
| Eccentricity: | 0.447119 |
| Period: | 1.64 yr (598.15 d) |
| Mean Motion: | / day |
| Inclination: | 2.63971° |
| Asc Node: | 205.68400° |
| Arg Peri: | 255.21993° |
| Moid: | 0.000186 AU |
| Abs Magnitude: | 30.158 |
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.