(25561) Leehyunki Main-belt Asteroid
Discovered on 10 December 1999 by LINEAR at Socorro.
Lee Hyun Ki (b. 1992) was awarded first place in the 2009 Intel International Science and Engineering Fair for his computer science team project. He attends the Chengdu International School, Chengdu, Sichuan, China.Naming citation (20100428/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Leehyunki is today
Seen from above the solar system on 2026-10-14: Leehyunki is 2.52 au from the Sun and 2.32 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 25561 |
| Provisional designation | 1999 XN173 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.97 km (#8,978 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0790 |
| Absolute magnitude (H) | 14.85 |
| Orbital period | 4.50 years |
| Semi-major axis | 2.73 au |
| Perihelion – aphelion | 2.49 – 2.97 au |
| Eccentricity | 0.0883 |
| Inclination | 5.17° |
| Closest distance between its orbit and Earth's (MOID) | 1.50 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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