(3284) Niebuhr Main-belt Asteroid
Discovered on 13 July 1953 by J. A. Bruwer at Johannesburg.
Where Niebuhr is today
Seen from above the solar system on 2026-10-14: Niebuhr is 2.41 au from the Sun and 3.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3284 |
| Provisional designation | 1953 NB |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.13 km (#5,668 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.124 |
| Rotation period | 4.31 hours |
| Absolute magnitude (H) | 13.11 |
| Orbital period | 4.61 years |
| Semi-major axis | 2.77 au |
| Perihelion – aphelion | 1.71 – 3.83 au |
| Eccentricity | 0.382 |
| Inclination | 6.65° |
| Closest distance between its orbit and Earth's (MOID) | 0.716 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.