(20401) Janghyunpark Main-belt Asteroid
Discovered on 21 July 1998 by LINEAR at Socorro.
Jang-Hyun Park (b. 1963) is a Korean astronomer and the ninth president of the Korea Astronomy and Space Science Institute in South Korea. He established a monitoring system for meteors, known as MONET (Korea Meteor Monitoring and Observation Network), and was the principal investigator of the OWL-Net wide-field survey project.Naming citation (WGSBN Bull. 6, #11, 18), IAU / Minor Planet Center, via NASA/JPL
Where Janghyunpark is today
Seen from above the solar system on 2026-10-14: Janghyunpark is 2.84 au from the Sun and 2.16 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20401 |
| Provisional designation | 1998 OX5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.75 km (#11,124 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.180 |
| Absolute magnitude (H) | 14.65 |
| Orbital period | 4.44 years |
| Semi-major axis | 2.70 au |
| Perihelion – aphelion | 2.56 – 2.84 au |
| Eccentricity | 0.0534 |
| Inclination | 11.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.55 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.