(21380) Devanssay Main-belt Asteroid
Discovered on 27 February 1998 by ODAS at Caussols.
Jean Benoit De Vanssay (b. 1970) is a French amateur astronomer and optician. As an amateur he has made several observing missions in the large amateur facilities in France (Pic du Midi, St. Véran), and as a professional has worked on optics for some of the largest telescopes in the world.Naming citation (20051215/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Devanssay is today
Seen from above the solar system on 2026-10-14: Devanssay is 1.98 au from the Sun and 2.72 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21380 |
| Provisional designation | 1998 DB20 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.72 |
| Orbital period | 3.42 years |
| Semi-major axis | 2.27 au |
| Perihelion – aphelion | 1.80 – 2.74 au |
| Eccentricity | 0.205 |
| Inclination | 6.63° |
| Closest distance between its orbit and Earth's (MOID) | 0.790 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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