(129259) Tapolca Outer Main-belt Asteroid
Discovered on 25 August 2005 by Sarneczky, K., Szam, D. at Piszkesteto.
Tapolca, a regional center in Hungary since the thirteenth century, is a town near Lake Balaton with currently 20~000 inhabitants. Its 300-meter cave system “Lake Cave”, which is situated in the heart of the town, is a unique attraction in Central Europe. Tapolca is the birthplace of the second discoverer.Naming citation (20080122/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tapolca is today
Seen from above the solar system on 2026-10-14: Tapolca is 3.26 au from the Sun and 2.43 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 129259 |
| Provisional designation | 2005 QD75 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 6.43 km (#8,335 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0620 |
| Absolute magnitude (H) | 14.73 |
| Orbital period | 6.50 years |
| Semi-major axis | 3.48 au |
| Perihelion – aphelion | 3.25 – 3.71 au |
| Eccentricity | 0.0652 |
| Inclination | 8.69° |
| Closest distance between its orbit and Earth's (MOID) | 2.27 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.