(1645) Waterfield Main-belt Asteroid
Discovered on 24 July 1933 by K. Reinmuth at Heidelberg.
Where Waterfield is today
Seen from above the solar system on 2026-10-14: Waterfield is 3.19 au from the Sun and 3.67 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1645 |
| Provisional designation | 1933 OJ |
| Orbit class | Main-belt Asteroid |
| Diameter | 28.1 km (#1,471 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0670 |
| Rotation period | 4.86 hours |
| Spectral type | XDC |
| Absolute magnitude (H) | 11.17 |
| Orbital period | 5.36 years |
| Semi-major axis | 3.06 au |
| Perihelion – aphelion | 2.72 – 3.40 au |
| Eccentricity | 0.111 |
| Inclination | 1.03° |
| Closest distance between its orbit and Earth's (MOID) | 1.72 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.