(5208) Royer Main-belt Asteroid
Discovered on 6 February 1989 by E. F. Helin at Palomar.
Where Royer is today
Seen from above the solar system on 2026-10-14: Royer is 2.48 au from the Sun and 3.14 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5208 |
| Provisional designation | 1989 CH1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.08 km (#6,493 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.270 |
| Rotation period | 3.87 hours |
| Spectral type | S |
| Absolute magnitude (H) | 12.79 |
| Orbital period | 4.20 years |
| Semi-major axis | 2.61 au |
| Perihelion – aphelion | 2.48 – 2.73 au |
| Eccentricity | 0.0489 |
| Inclination | 15.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.50 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.