(20641) Yenuanchen Main-belt Asteroid
Discovered on 4 October 1999 by LINEAR at Socorro.
Yen Uan-Chen (b. 1986) was awarded second place in the 2004 Intel International Science and Engineering Fair for her botany project. She also received the Intel Foundation Achievement Award. She attends the Affiliated Senior High School of NKNU, Kaohsiung, Taiwan.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yenuanchen is today
Seen from above the solar system on 2026-10-14: Yenuanchen is 2.98 au from the Sun and 2.44 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20641 |
| Provisional designation | 1999 TF121 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.24 |
| Orbital period | 5.26 years |
| Semi-major axis | 3.03 au |
| Perihelion – aphelion | 2.72 – 3.33 au |
| Eccentricity | 0.102 |
| Inclination | 2.86° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Yen
All asteroids named after someone called Yen
Also discovered on 4 October 1999
- (13407) Ikukomakino
- (15093) Lestermackey
- (15509) Annejing
- (15510) Phoeberounds
- (16088) Jessgoldstein
- (17179) Codina
- (20626) Rider-Stokes
- (20638) Lingchen
- (20639) Michellouie
- (20642) Laurajohnson
- (21804) Vaclavneumann
- (21815) Fanyang