(4438) Sykes Main-belt Asteroid
Discovered on 29 November 1983 by E. Bowell at Anderson Mesa.
Where Sykes is today
Seen from above the solar system on 2026-10-14: Sykes is 3.41 au from the Sun and 4.33 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4438 |
| Provisional designation | 1983 WR |
| Orbit class | Main-belt Asteroid |
| Diameter | 26.7 km (#1,562 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0620 |
| Absolute magnitude (H) | 11.71 |
| Orbital period | 5.62 years |
| Semi-major axis | 3.16 au |
| Perihelion – aphelion | 2.36 – 3.96 au |
| Eccentricity | 0.253 |
| Inclination | 13.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.39 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.