(3728) IRAS Main-belt Asteroid
Discovered on 23 August 1983 by IRAS at IRAS.
Where IRAS is today
Seen from above the solar system on 2026-10-14: IRAS is 2.33 au from the Sun and 1.37 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3728 |
| Provisional designation | 1983 QF |
| Orbit class | Main-belt Asteroid |
| Diameter | 23.4 km (#1,821 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0860 |
| Rotation period | 7.06 hours |
| Absolute magnitude (H) | 12.06 |
| Orbital period | 4.32 years |
| Semi-major axis | 2.65 au |
| Perihelion – aphelion | 2.10 – 3.21 au |
| Eccentricity | 0.210 |
| Inclination | 22.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.23 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.