(20420) Marashwhitman Main-belt Asteroid
Discovered on 26 September 1998 by LINEAR at Socorro.
David I. Marash-Whitman (b. 1991) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his environmental sciences project. He attends the South Peninsula Hebrew Day School, Sunnyvale, California.Naming citation (20041028/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Marashwhitman is today
Seen from above the solar system on 2026-10-14: Marashwhitman is 2.87 au from the Sun and 3.85 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20420 |
| Provisional designation | 1998 SN129 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.03 |
| Orbital period | 4.30 years |
| Semi-major axis | 2.64 au |
| Perihelion – aphelion | 2.35 – 2.94 au |
| Eccentricity | 0.111 |
| Inclination | 1.72° |
| Closest distance between its orbit and Earth's (MOID) | 1.34 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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