(19643) Jacobrucker Main-belt Asteroid
Discovered on 7 September 1999 by LINEAR at Socorro.
Jacob Jeffrey Rucker (b. 1989) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for his earth and space science project. He attends the Rhoades School for the Gifted, Encinitas, California.Naming citation (20031010/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Jacobrucker is today
Seen from above the solar system on 2026-10-14: Jacobrucker is 3.28 au from the Sun and 2.44 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 19643 |
| Provisional designation | 1999 RA95 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.78 km (#6,800 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0800 |
| Absolute magnitude (H) | 14.27 |
| Orbital period | 5.45 years |
| Semi-major axis | 3.10 au |
| Perihelion – aphelion | 2.70 – 3.50 au |
| Eccentricity | 0.130 |
| Inclination | 1.03° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Jacob
Also discovered on 7 September 1999
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