(1781) Van Biesbroeck Main-belt Asteroid
Discovered on 17 October 1906 by A. Kopff at Heidelberg.
Where Van Biesbroeck is today
Seen from above the solar system on 2026-10-14: Van Biesbroeck is 2.59 au from the Sun and 3.49 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1781 |
| Provisional designation | A906 UB |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.50 km (#6,148 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.203 |
| Rotation period | 6.38 hours |
| Absolute magnitude (H) | 13.01 |
| Orbital period | 3.71 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 2.14 – 2.65 au |
| Eccentricity | 0.108 |
| Inclination | 6.94° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.