(159865) Silvialonso Main-belt Asteroid
Discovered on 12 August 2004 by J. Manteca at Begues.
Silvia Alonso Perez (b. 1976), of La Laguna, Tenerife, was responsible for teaching astrometry to many Spanish amateur astronomers. This was the beginning of the Minor Planet Center's assignment of many new observatory codes in Spain.Naming citation (20080122/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Silvialonso is today
Seen from above the solar system on 2026-10-14: Silvialonso is 2.39 au from the Sun and 1.57 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 159865 |
| Provisional designation | 2004 PX66 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.12 |
| Orbital period | 3.60 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 1.89 – 2.82 au |
| Eccentricity | 0.197 |
| Inclination | 11.1° |
| Closest distance between its orbit and Earth's (MOID) | 0.882 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Silvia
All asteroids named after someone called Silvia