(3959) Irwin Main-belt Asteroid
Discovered on 28 October 1954 by Indiana University at Brooklyn.
👶 Irwin as a baby name🐶 Irwin as a dog name
Where Irwin is today
Seen from above the solar system on 2026-10-14: Irwin is 2.13 au from the Sun and 2.67 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3959 |
| Provisional designation | 1954 UN2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.14 km (#12,396 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.259 |
| Rotation period | 3.26 hours |
| Absolute magnitude (H) | 14.04 |
| Orbital period | 3.40 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 1.84 – 2.68 au |
| Eccentricity | 0.187 |
| Inclination | 3.29° |
| Closest distance between its orbit and Earth's (MOID) | 0.845 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.