(12640) Reinbertdeleeuw Main-belt Asteroid
Discovered on 29 September 1973 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Dutch conductor, pianist and composer Reinbert de Leeuw (b. 1938), is devoted to performing and recording classical music composed after 1900, preferably in the presence of the composer. In 1974 he founded the Schoenberg Ensemble.Naming citation (MPC batch dated 2014-05-14), IAU / Minor Planet Center, via NASA/JPL
Where Reinbertdeleeuw is today
Seen from above the solar system on 2026-10-14: Reinbertdeleeuw is 3.07 au from the Sun and 4.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12640 |
| Provisional designation | 1231 T-2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.06 km (#10,492 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.274 |
| Absolute magnitude (H) | 13.85 |
| Orbital period | 5.02 years |
| Semi-major axis | 2.93 au |
| Perihelion – aphelion | 2.77 – 3.09 au |
| Eccentricity | 0.0545 |
| Inclination | 1.87° |
| Closest distance between its orbit and Earth's (MOID) | 1.78 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 29 September 1973
- (2049) Grietje
- (4357) Korinthos
- (4549) Burkhardt
- (4721) Atahualpa
- (4752) Myron
- (4876) Strabo
- (4978) Seitz
- (5151) Weerstra
- (5197) Rottmann
- (5243) Clasien
- (5244) Amphilochos
- (5266) Rauch