(21709) Sethmurray Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
Seth Asa Murray (b. 1987) was awarded second place in the 2005 Intel International Science and Engineering Fair for his microbiology project. He attends the Northeastern High School, Springfield, Ohio, U.S.A.Naming citation (20050822/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Sethmurray is today
Seen from above the solar system on 2026-10-14: Sethmurray is 2.43 au from the Sun and 1.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21709 |
| Provisional designation | 1999 RK92 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.34 km (#11,976 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.215 |
| Rotation period | 1.59 hours |
| Absolute magnitude (H) | 14.34 |
| Orbital period | 3.40 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 2.05 – 2.46 au |
| Eccentricity | 0.0906 |
| Inclination | 6.06° |
| Closest distance between its orbit and Earth's (MOID) | 1.07 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Seth
All asteroids named after someone called Seth
Also discovered on 7 September 1999
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