(4504) Jenkinson Main-belt Asteroid
Discovered on 21 December 1989 by R. H. McNaught at Siding Spring.
Where Jenkinson is today
Seen from above the solar system on 2026-10-14: Jenkinson is 2.44 au from the Sun and 1.81 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4504 |
| Provisional designation | 1989 YO |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.40 km (#7,208 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.169 |
| Rotation period | 30.8 hours |
| Absolute magnitude (H) | 13.39 |
| Orbital period | 4.20 years |
| Semi-major axis | 2.60 au |
| Perihelion – aphelion | 2.26 – 2.95 au |
| Eccentricity | 0.133 |
| Inclination | 14.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.29 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.