(1420) Radcliffe Main-belt Asteroid
Discovered on 14 September 1931 by K. Reinmuth at Heidelberg.
Where Radcliffe is today
Seen from above the solar system on 2026-10-14: Radcliffe is 2.55 au from the Sun and 2.48 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1420 |
| Provisional designation | 1931 RJ |
| Orbit class | Main-belt Asteroid |
| Diameter | 20.5 km (#2,141 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0470 |
| Rotation period | 4.79 hours |
| Spectral type | X |
| Absolute magnitude (H) | 12.0 |
| Orbital period | 4.56 years |
| Semi-major axis | 2.75 au |
| Perihelion – aphelion | 2.53 – 2.96 au |
| Eccentricity | 0.0780 |
| Inclination | 3.49° |
| Closest distance between its orbit and Earth's (MOID) | 1.53 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.