(31439) Mieyamanaka Main-belt Asteroid
Discovered on 18 January 1999 by LINEAR at Socorro.
Mie Yamanaka (b. 1996) was awarded second place in the 2014 Intel International Science and Engineering Fair for her energy and transportation project. She attends the Sendai Daini Senior High School, Sendai, Miyagi, Japan.Naming citation (MPC batch dated 2015-07-02), IAU / Minor Planet Center, via NASA/JPL
Where Mieyamanaka is today
Seen from above the solar system on 2026-10-14: Mieyamanaka is 2.46 au from the Sun and 2.27 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31439 |
| Provisional designation | 1999 BQ23 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.65 km (#15,953 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.275 |
| Absolute magnitude (H) | 14.78 |
| Orbital period | 3.50 years |
| Semi-major axis | 2.30 au |
| Perihelion – aphelion | 1.93 – 2.68 au |
| Eccentricity | 0.163 |
| Inclination | 5.42° |
| Closest distance between its orbit and Earth's (MOID) | 0.932 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 18 January 1999
- (15076) Joellewis
- (15476) Narendra
- (17880) Vanessaparker
- (29730) Bethwestfall
- (29747) Acorlando
- (33372) Jonathanchung
- (121016) Christopharnold