2018 UA
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.
The 10 minute motion of 2018 UA past the Earth on 19 October 2018 | |
| Discovery | |
|---|---|
| Discovery date | 19 October 2018 |
| Designations | |
MPC designation | 2018 UA |
| Orbital characteristics | |
| Aphelion | 2.010531 AU |
| Perihelion | 0.768136 AU |
Semi-major axis | 1.38933 AU |
| Eccentricity | 0.447119 |
Orbital period (sidereal) | 1.64 yr (598.15 d) |
Mean anomaly | 83.09092° |
Mean motion | 0° 36m 6.69s / day |
| Inclination | 2.63971° |
Longitude of ascending node | 205.68400° |
| 255.21993° | |
| Earth MOID | 0.000186 AU |
| Physical characteristics | |
| 30.158 | |
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