(21629) Siperstein Main-belt Asteroid
Discovered on 13 July 1999 by LINEAR at Socorro.
Brian Furness Siperstein (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his microbiology team project. He attends the Oregon Episcopal School, Portland, Oregon, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Siperstein is today
Seen from above the solar system on 2026-10-14: Siperstein is 2.24 au from the Sun and 2.01 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21629 |
| Provisional designation | 1999 NT8 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.38 |
| Orbital period | 3.25 years |
| Semi-major axis | 2.19 au |
| Perihelion – aphelion | 2.12 – 2.26 au |
| Eccentricity | 0.0313 |
| Inclination | 1.21° |
| Closest distance between its orbit and Earth's (MOID) | 1.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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