(12123) Pazin Main-belt Asteroid
Discovered on 18 July 1999 by Visnjan at Visnjan.
Pazin is a Croatian town in the heart of the Istrian Peninsula and the administrative center of Istria county. The Castle of Pazin is the biggest medieval fortress in Istria and was first mentioned in written documents in the year 983. Jules Verne was inspired to use it for the plot of his 1885 novel Mathias Sandorf.Naming citation (20090607/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Pazin is today
Seen from above the solar system on 2026-10-14: Pazin is 1.98 au from the Sun and 1.20 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12123 |
| Provisional designation | 1999 OS |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.67 km (#9,457 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0870 |
| Absolute magnitude (H) | 14.39 |
| Orbital period | 3.81 years |
| Semi-major axis | 2.44 au |
| Perihelion – aphelion | 1.96 – 2.92 au |
| Eccentricity | 0.196 |
| Inclination | 2.32° |
| Closest distance between its orbit and Earth's (MOID) | 0.963 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.