(22921) Siyuanliu Main-belt Asteroid
Discovered on 2 October 1999 by LINEAR at Socorro.
Siyuan Liu (b. 1989) is a finalist in the 2007 Intel Science Talent Search (STS), a science competition for high school seniors, for his biochemistry project. He attends the Troy High School, Troy, Michigan.Naming citation (20070303/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Siyuanliu is today
Seen from above the solar system on 2026-10-14: Siyuanliu is 2.00 au from the Sun and 1.92 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 22921 |
| Provisional designation | 1999 TG95 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.39 |
| Orbital period | 3.43 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 1.97 – 2.58 au |
| Eccentricity | 0.134 |
| Inclination | 7.65° |
| Closest distance between its orbit and Earth's (MOID) | 0.968 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 2 October 1999
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- (12935) Zhengzhemin
- (13406) Sekora
- (16087) Rhythmgarg
- (16094) Scottmccord
- (20629) Robert
- (20631) Stefuller
- (20632) Carlyrosser
- (20633) Robertluther
- (20634) Marichardson
- (20635) Robinandrews
- (20636) Romanhirsch