(20474) Reasoner Main-belt Asteroid
Discovered on 13 July 1999 by LINEAR at Socorro.
Jonathan William Reasoner (b. 1992) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his behavioral science project. He attends the Harelson Elementary School, Tucson, Arizona.Naming citation (20041028/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Reasoner is today
Seen from above the solar system on 2026-10-14: Reasoner is 2.34 au from the Sun and 2.42 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20474 |
| Provisional designation | 1999 NV9 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.78 km (#15,697 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.251 |
| Absolute magnitude (H) | 15.13 |
| Orbital period | 3.42 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.98 – 2.56 au |
| Eccentricity | 0.128 |
| Inclination | 7.48° |
| Closest distance between its orbit and Earth's (MOID) | 0.994 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Jonathan
- (2392) Jonathan Murray
- (5406) Jonjoseph
- (15116) Jaytate
- (16166) Jonlii
- (18891) Kamler
- (18997) Mizrahi
- (19423) Hefter
- (20342) Trinh
- (22550) Jonsellon
- (23730) Suncar
- (23757) Jonmunoz
- (24131) Jonathuggins
All asteroids named after someone called Jonathan
Also discovered on 13 July 1999
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- (11747) Libbykamen
- (12118) Mirotsin
- (12119) Memamis
- (12121) Greenwald
- (12572) Sadegh
- (15501) Pepawlowski
- (18821) Markhavel
- (18836) Raymundto
- (19582) Blow
- (19584) Sarahgerin
- (19585) Zachopkins