(20623) Davidyoung Main-belt Asteroid
Discovered on 10 October 1999 by Abraham, M., Fedon, G. at Everstar.
David Young (b. 1955) has been for many years a great contributor to the astronomy community. He has always been there to help and has selflessly given countless hours to education, public programs and scientific research. He has often donated equipment and his technical expertise whenever and however needed.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Davidyoung is today
Seen from above the solar system on 2026-10-14: Davidyoung is 2.99 au from the Sun and 3.48 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20623 |
| Provisional designation | 1999 TS11 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.16 km (#8,707 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.294 |
| Rotation period | 19.9 hours |
| Absolute magnitude (H) | 13.33 |
| Orbital period | 4.30 years |
| Semi-major axis | 2.65 au |
| Perihelion – aphelion | 2.14 – 3.15 au |
| Eccentricity | 0.190 |
| Inclination | 12.6° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called David
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