(4220) Flood Main-belt Asteroid
Discovered on 22 February 1988 by R. H. McNaught at Siding Spring.
Where Flood is today
Seen from above the solar system on 2026-10-14: Flood is 3.19 au from the Sun and 4.04 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4220 |
| Provisional designation | 1988 DN |
| Orbit class | Main-belt Asteroid |
| Diameter | 11.1 km (#4,492 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0680 |
| Absolute magnitude (H) | 13.76 |
| Orbital period | 4.69 years |
| Semi-major axis | 2.80 au |
| Perihelion – aphelion | 2.26 – 3.35 au |
| Eccentricity | 0.195 |
| Inclination | 7.00° |
| Closest distance between its orbit and Earth's (MOID) | 1.28 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.