(10258) Sarneczky Main-belt Asteroid
Discovered on 6 January 1940 by G. Kulin at Konkoly.
Krisztián Sárneczky (b. 1974) is a Hungarian asteroid and comet researcher at Konkoly Observatory, who discovered 363 numbered asteroids and five supernovae. He is a very active science communicator, and the leader of the Comet Section of the Hungarian Astronomical Association.Naming citation (MPC batch dated 2017-10-05), IAU / Minor Planet Center, via NASA/JPL
Where Sarneczky is today
Seen from above the solar system on 2026-10-14: Sarneczky is 3.42 au from the Sun and 4.01 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 10258 |
| Provisional designation | 1940 AB |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.3 km (#3,323 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.151 |
| Absolute magnitude (H) | 12.12 |
| Orbital period | 5.63 years |
| Semi-major axis | 3.16 au |
| Perihelion – aphelion | 2.88 – 3.44 au |
| Eccentricity | 0.0892 |
| Inclination | 14.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.93 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.