(5516) Jawilliamson Main-belt Asteroid
Discovered on 2 May 1989 by E. F. Helin at Palomar.
Where Jawilliamson is today
Seen from above the solar system on 2026-10-14: Jawilliamson is 2.22 au from the Sun and 3.09 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5516 |
| Provisional designation | 1989 JK |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.5 km (#4,298 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0720 |
| Rotation period | 5.15 hours |
| Absolute magnitude (H) | 13.44 |
| Orbital period | 4.16 years |
| Semi-major axis | 2.59 au |
| Perihelion – aphelion | 2.16 – 3.01 au |
| Eccentricity | 0.165 |
| Inclination | 13.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.17 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.