(25476) Sealfon Main-belt Asteroid
Discovered on 7 December 1999 by LINEAR at Socorro.
Adam Benjamin Sealfon (b. 1991) is a finalist in the 2009 Intel Science Talent Search (STS), a science competition for high school seniors, for his computer science project. He attends the Stuyvesant High School, New York, New York.Naming citation (20090311/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Sealfon is today
Seen from above the solar system on 2026-10-14: Sealfon is 2.65 au from the Sun and 3.64 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 25476 |
| Provisional designation | 1999 XU42 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.53 |
| Orbital period | 3.61 years |
| Semi-major axis | 2.35 au |
| Perihelion – aphelion | 2.05 – 2.65 au |
| Eccentricity | 0.127 |
| Inclination | 2.90° |
| Closest distance between its orbit and Earth's (MOID) | 1.06 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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