(2356) Hirons Outer Main-belt Asteroid
Discovered on 17 October 1979 by E. Bowell at Anderson Mesa.
Named in honor of the discoverer's parents-in-law, Charles and Ann Hirons.Naming citation (MPC 6208), IAU / Minor Planet Center, via NASA/JPL
Where Hirons is today
Seen from above the solar system on 2026-10-14: Hirons is 3.27 au from the Sun and 2.80 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2356 |
| Provisional designation | 1979 UJ |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 43.1 km (#894 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0480 |
| Rotation period | 41.9 hours |
| Absolute magnitude (H) | 10.95 |
| Orbital period | 5.81 years |
| Semi-major axis | 3.23 au |
| Perihelion – aphelion | 3.10 – 3.36 au |
| Eccentricity | 0.0401 |
| Inclination | 15.6° |
| Closest distance between its orbit and Earth's (MOID) | 2.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.