(3428) Roberts Main-belt Asteroid
Discovered on 1 May 1952 by Indiana University at Brooklyn.
Where Roberts is today
Seen from above the solar system on 2026-10-14: Roberts is 2.75 au from the Sun and 3.03 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3428 |
| Provisional designation | 1952 JH |
| Orbit class | Main-belt Asteroid |
| Diameter | 17.2 km (#2,637 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0950 |
| Rotation period | 3.28 hours |
| Absolute magnitude (H) | 12.28 |
| Orbital period | 4.35 years |
| Semi-major axis | 2.67 au |
| Perihelion – aphelion | 2.23 – 3.10 au |
| Eccentricity | 0.162 |
| Inclination | 8.88° |
| Closest distance between its orbit and Earth's (MOID) | 1.25 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.