(12151) Oranje-Nassau Main-belt Asteroid
Discovered on 25 March 1971 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Willem I, Prince van Oranje-Nassau (1533-1584), led the Netherlands provinces in their war of liberation against Spain during 1568-1648. “The Father of the Fatherland” was assassinated and is entombed in the Nieuwe Kerk in Delft. The Dutch national anthem, the Wilhelmus, was written in his honor.Naming citation (20080122/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Oranje-Nassau is today
Seen from above the solar system on 2026-10-14: Oranje-Nassau is 2.47 au from the Sun and 1.62 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12151 |
| Provisional designation | 1220 T-1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.02 km (#15,162 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.369 |
| Absolute magnitude (H) | 14.59 |
| Orbital period | 3.79 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 2.09 – 2.77 au |
| Eccentricity | 0.140 |
| Inclination | 1.45° |
| Closest distance between its orbit and Earth's (MOID) | 1.10 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 25 March 1971
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