(31642) Soyounchoi Main-belt Asteroid
Discovered on 14 April 1999 by LINEAR at Socorro.
Soyoun Choi (b. 1999) is a finalist in the 2015 Broadcom MASTERS, a math and science competition for middle school students, for her behavioral and social sciences project. She attends the Viera Charter School, Melbourne, Florida.Naming citation (MPC batch dated 2015-11-25), IAU / Minor Planet Center, via NASA/JPL
Where Soyounchoi is today
Seen from above the solar system on 2026-10-14: Soyounchoi is 2.98 au from the Sun and 3.00 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31642 |
| Provisional designation | 1999 GX36 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.19 km (#8,655 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0420 |
| Absolute magnitude (H) | 15.39 |
| Orbital period | 4.39 years |
| Semi-major axis | 2.68 au |
| Perihelion – aphelion | 2.30 – 3.06 au |
| Eccentricity | 0.140 |
| Inclination | 1.40° |
| Closest distance between its orbit and Earth's (MOID) | 1.32 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.