(19638) Johngenereid Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
John Gene Reid (b. 1990) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for his botany and zoology project. He attends the Moore Middle School, Redlands, California.Naming citation (20031010/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Johngenereid is today
Seen from above the solar system on 2026-10-14: Johngenereid is 2.65 au from the Sun and 2.61 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 19638 |
| Provisional designation | 1999 RH57 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.75 km (#9,301 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0930 |
| Rotation period | 130 hours |
| Absolute magnitude (H) | 14.76 |
| Orbital period | 4.58 years |
| Semi-major axis | 2.76 au |
| Perihelion – aphelion | 2.65 – 2.86 au |
| Eccentricity | 0.0383 |
| Inclination | 5.76° |
| Closest distance between its orbit and Earth's (MOID) | 1.64 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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