(218400) Marquardt Main-belt Asteroid
Discovered on 22 August 2004 by W. Ries at Altschwendt.
Daniel Marquardt (b. 1983), known for his high-quality astrophotographs, is a writer and educator. He is known particularly for his pioneering work in remote astrophotography, aand he was one of the initiators of ROSA (Remote Observatories Southern Alps), a remote observatory park in the south of France.Naming citation (WGSBN Bull. 2, #9, 7), IAU / Minor Planet Center, via NASA/JPL
Where Marquardt is today
Seen from above the solar system on 2026-10-14: Marquardt is 2.89 au from the Sun and 2.13 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 218400 |
| Provisional designation | 2004 QG7 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.87 |
| Orbital period | 5.39 years |
| Semi-major axis | 3.07 au |
| Perihelion – aphelion | 2.66 – 3.49 au |
| Eccentricity | 0.135 |
| Inclination | 11.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Daniel