(3573) Holmberg Main-belt Asteroid
Discovered on 16 August 1982 by C.-I. Lagerkvist at La Silla.
Where Holmberg is today
Seen from above the solar system on 2026-10-14: Holmberg is 2.21 au from the Sun and 1.28 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3573 |
| Provisional designation | 1982 QO1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.25 km (#8,587 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.343 |
| Rotation period | 6.54 hours |
| Absolute magnitude (H) | 13.05 |
| Orbital period | 3.35 years |
| Semi-major axis | 2.24 au |
| Perihelion – aphelion | 2.09 – 2.39 au |
| Eccentricity | 0.0659 |
| Inclination | 2.77° |
| Closest distance between its orbit and Earth's (MOID) | 1.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.