(21903) Wallace Main-belt Asteroid
Discovered on 10 November 1999 by C. W. Juels at Fountain Hills.
Patrick T. Wallace (b. 1946) is a specialist in telescope control software. From 1973 to 1980 he was on the staff of the Anglo-Australian Observatory. During 1982-2000 he directed the Starlink astronomical computing service in the U.K., and he is currently head of H.M. Nautical Almanac Office.Naming citation (20011101/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Wallace as a baby name🐶 Wallace as a dog name🐱 Wallace as a cat name
Where Wallace is today
Seen from above the solar system on 2026-10-14: Wallace is 2.94 au from the Sun and 2.36 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21903 |
| Provisional designation | 1999 VE12 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 12.73 |
| Orbital period | 5.32 years |
| Semi-major axis | 3.05 au |
| Perihelion – aphelion | 2.90 – 3.20 au |
| Eccentricity | 0.0486 |
| Inclination | 9.72° |
| Closest distance between its orbit and Earth's (MOID) | 1.94 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Patrick
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