(391988) Illmarton Main-belt Asteroid
Discovered on 27 December 2008 by K. Sarneczky at Piszkesteto.
Márton Ill (1930-2015) was a Hungarian astronomer and space scientist. He established the first Hungarian satellite monitoring base at the Baja Astronomical Observatory in 1958, of which he was the director between 1966 and 1990. His main field of research was the study of the properties of the upper atmosphere.Naming citation (MPC batch dated 2015-08-29), IAU / Minor Planet Center, via NASA/JPL
Where Illmarton is today
Seen from above the solar system on 2026-10-14: Illmarton is 3.12 au from the Sun and 3.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 391988 |
| Provisional designation | 2008 YF26 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.98 |
| Orbital period | 4.24 years |
| Semi-major axis | 2.62 au |
| Perihelion – aphelion | 2.11 – 3.13 au |
| Eccentricity | 0.195 |
| Inclination | 9.14° |
| Closest distance between its orbit and Earth's (MOID) | 1.12 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.