(90503) Japhethboyce Main-belt Asteroid
Discovered on 15 March 2004 by CSS at Catalina.
Japheth Boyce (b. 1956), a paleontologist in South Dakota, is best known for his exquisite fossil preparation seen in museums around the world. He specializes in White River Badlands as well as Hell Creek material. He also appeared in the TV program Walking with Prehistoric Beasts.Naming citation (WGSBN Bull. 3, #12, 12), IAU / Minor Planet Center, via NASA/JPL
Where Japhethboyce is today
Seen from above the solar system on 2026-10-14: Japhethboyce is 2.52 au from the Sun and 3.51 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 90503 |
| Provisional designation | 2004 EP10 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.93 |
| Orbital period | 3.71 years |
| Semi-major axis | 2.40 au |
| Perihelion – aphelion | 1.91 – 2.88 au |
| Eccentricity | 0.204 |
| Inclination | 2.14° |
| Closest distance between its orbit and Earth's (MOID) | 0.896 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 15 March 2004
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