(21571) Naegeli Main-belt Asteroid
Discovered on 14 September 1998 by LINEAR at Socorro.
Kaleb Markus Naegeli (b. 1987) was awarded first place in the 2006 Intel International Science and Engineering Fair for his medicine and health project. He attends the Northwestern High School, Kokomo, Indiana, U.S.A.Naming citation (20060711/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Naegeli is today
Seen from above the solar system on 2026-10-14: Naegeli is 2.68 au from the Sun and 3.56 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21571 |
| Provisional designation | 1998 RD51 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.96 km (#10,693 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.286 |
| Absolute magnitude (H) | 13.79 |
| Orbital period | 4.32 years |
| Semi-major axis | 2.65 au |
| Perihelion – aphelion | 2.51 – 2.80 au |
| Eccentricity | 0.0550 |
| Inclination | 5.11° |
| Closest distance between its orbit and Earth's (MOID) | 1.49 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 14 September 1998
- (9810) Elanfiller
- (11190) Jennibell
- (12898) Mignard
- (12900) Rishabjain
- (12903) Isabellekatz
- (12906) Alexismacavoy
- (12907) Giannanilvo
- (13301) Hofsteen
- (13302) Kezmoh
- (13303) Asmitakumar
- (13305) Danielang
- (13307) Taralarsen