(9669) Symmetria Outer Main-belt Asteroid
Discovered on 8 July 1997 by P. G. Comba at Prescott.
Name suggested by the palindromic shape of the numeral 9669, and the fact that each pair of its digits is invariant under a rotation by 180 degrees.Naming citation (19990202/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Symmetria is today
Seen from above the solar system on 2026-10-14: Symmetria is 2.98 au from the Sun and 2.59 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9669 |
| Provisional designation | 1997 NC3 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 11.4 km (#4,377 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0720 |
| Absolute magnitude (H) | 13.33 |
| Orbital period | 5.81 years |
| Semi-major axis | 3.23 au |
| Perihelion – aphelion | 2.66 – 3.80 au |
| Eccentricity | 0.178 |
| Inclination | 0.441° |
| Closest distance between its orbit and Earth's (MOID) | 1.66 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.