(20409) Joeychatelain Main-belt Asteroid
Discovered on 17 August 1998 by LINEAR at Socorro.
Joseph Chatelain (b. 1986) is an American astronomer and software engineer at Las Cumbres Observatory. He specializes in the study of color distributions of Jupiter Trojans and the characterization of Near-Earth Objects. He leads the development of open-source software tools for astronomical research programs that benefit a global user community.Naming citation (WGSBN Bull. 6, #11, 18), IAU / Minor Planet Center, via NASA/JPL
Where Joeychatelain is today
Seen from above the solar system on 2026-10-14: Joeychatelain is 3.34 au from the Sun and 2.58 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20409 |
| Provisional designation | 1998 QP43 |
| Orbit class | Main-belt Asteroid |
| Diameter | 14.1 km (#3,364 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0800 |
| Rotation period | 655 hours |
| Absolute magnitude (H) | 12.98 |
| Orbital period | 5.60 years |
| Semi-major axis | 3.15 au |
| Perihelion – aphelion | 2.85 – 3.45 au |
| Eccentricity | 0.0958 |
| Inclination | 17.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.90 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Joseph
Also discovered on 17 August 1998
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