(20043) Ellenmacarthur Inner Main-belt Asteroid
Discovered on 2 March 1993 by R. H. McNaught at Siding Spring.
British yachtswoman Ellen MacArthur (b. 1976) finished second in the Vendee Globe round-the-world race in 2000-2001, the youngest competitor ever to complete the course. On 2005 Feb. 7, with a time of 71.8 days, she broke by 1.1 days the previous record for the fastest single-handed non-stop circumnavigation.Naming citation (20050407/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Ellenmacarthur is today
Seen from above the solar system on 2026-10-14: Ellenmacarthur is 1.92 au from the Sun and 2.62 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20043 |
| Provisional designation | 1993 EM |
| Orbit class | Inner Main-belt Asteroid |
| Spectral type | U |
| Absolute magnitude (H) | 15.7 |
| Orbital period | 2.76 years |
| Semi-major axis | 1.97 au |
| Perihelion – aphelion | 1.86 – 2.08 au |
| Eccentricity | 0.0575 |
| Inclination | 18.3° |
| Closest distance between its orbit and Earth's (MOID) | 0.897 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Ellen