(5389) Choikaiyau Main-belt Asteroid
Discovered on 29 October 1981 by Purple Mountain Observatory at Nanking.
Where Choikaiyau is today
Seen from above the solar system on 2026-10-14: Choikaiyau is 2.64 au from the Sun and 3.24 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5389 |
| Provisional designation | 1981 UB10 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.48 km (#11,667 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.383 |
| Absolute magnitude (H) | 13.49 |
| Orbital period | 3.67 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 2.01 – 2.75 au |
| Eccentricity | 0.155 |
| Inclination | 8.10° |
| Closest distance between its orbit and Earth's (MOID) | 1.02 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.