(20639) Michellouie Main-belt Asteroid
Discovered on 4 October 1999 by LINEAR at Socorro.
Michelle Louie (b. 1986) was awarded second place in the 2004 Intel International Science and Engineering Fair for her botany project. She attends the Kings Park High School, Kings Park, New York, U.S.A.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Michellouie is today
Seen from above the solar system on 2026-10-14: Michellouie is 2.39 au from the Sun and 2.30 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20639 |
| Provisional designation | 1999 TD109 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.02 km (#12,685 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.250 |
| Rotation period | 3.51 hours |
| Absolute magnitude (H) | 14.03 |
| Orbital period | 4.32 years |
| Semi-major axis | 2.65 au |
| Perihelion – aphelion | 2.38 – 2.92 au |
| Eccentricity | 0.102 |
| Inclination | 9.73° |
| Closest distance between its orbit and Earth's (MOID) | 1.40 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Michelle
- (4202) Minitti
- (11868) Kleinrichert
- (12282) Crombecq
- (14329) Michellethompson
- (15507) Rengarajan
- (21572) Nguyen-McCarty
- (22482) Michbertier
- (27107) Michelleabi
- (28094) Michellewis
- (28778) Michdelucia
- (31519) Mimamarquez
- (32389) Michflannory
All asteroids named after someone called Michelle
Also discovered on 4 October 1999
- (13407) Ikukomakino
- (15093) Lestermackey
- (15509) Annejing
- (15510) Phoeberounds
- (16088) Jessgoldstein
- (17179) Codina
- (20626) Rider-Stokes
- (20638) Lingchen
- (20641) Yenuanchen
- (20642) Laurajohnson
- (21804) Vaclavneumann
- (21815) Fanyang