(20335) Charmartell Main-belt Asteroid
Discovered on 21 April 1998 by LINEAR at Socorro.
Charles Martell mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Ulysses S. Grant High School, Portland, Oregon.Naming citation (20040415/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Charmartell is today
Seen from above the solar system on 2026-10-14: Charmartell is 2.57 au from the Sun and 3.17 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20335 |
| Provisional designation | 1998 HK57 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.63 km (#15,995 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.336 |
| Absolute magnitude (H) | 15.04 |
| Orbital period | 3.98 years |
| Semi-major axis | 2.51 au |
| Perihelion – aphelion | 2.45 – 2.57 au |
| Eccentricity | 0.0253 |
| Inclination | 2.84° |
| Closest distance between its orbit and Earth's (MOID) | 1.46 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Charles
- (1991) Darwin
- (4603) Bertaud
- (4939) Scovil
- (5202) Charleseliot
- (7011) Worley
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- (9714) Piazzismyth
- (10320) Reiland
- (11356) Chuckjones
- (11778) Kingsford Smith
- (11849) Fauvel
- (12259) Szukalski
All asteroids named after someone called Charles
Also discovered on 21 April 1998
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- (11715) Harperclark
- (11716) Amahartman
- (11718) Hayward
- (11719) Hicklen
- (11720) Horodyskyj
- (11721) Shawnlowe
- (11724) Ronaldhsu
- (11725) Victoriahsu
- (12091) Jesmalmquist
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- (12093) Chrimatthews