(12642) Davidjansen Main-belt Asteroid
Discovered on 29 September 1973 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
David Jona Jansen (b. 1968) is a Dutch astronomer in Leiden, who used Westerbork Synthesis Radio Telescope data and later reduction of sub-mm data for his thesis on dense interstellar medium which made him an expert in the data treatment systems at Leiden Observatory. His continued support there is essential.Naming citation (MPC batch dated 2015-01-05), IAU / Minor Planet Center, via NASA/JPL
Where Davidjansen is today
Seen from above the solar system on 2026-10-14: Davidjansen is 2.65 au from the Sun and 3.15 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12642 |
| Provisional designation | 1348 T-2 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 14.7 |
| Orbital period | 3.62 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 1.94 – 2.78 au |
| Eccentricity | 0.177 |
| Inclination | 4.53° |
| Closest distance between its orbit and Earth's (MOID) | 0.960 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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