(18413) Adamspencer Main-belt Asteroid
Discovered on 13 June 1993 by R. H. McNaught at Siding Spring.
Adam Spencer (b. 1969) is an Australian mathematics communicator, television and radio presenter. Spencer's career has moved from mathematics research to stand-up pure maths comedy and “The Sleek Geeks” science comedy duo. He holds positions promoting the understanding and development of science.Naming citation (20120406/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Adamspencer is today
Seen from above the solar system on 2026-10-14: Adamspencer is 2.71 au from the Sun and 2.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18413 |
| Provisional designation | 1993 LD1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.86 km (#9,138 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0890 |
| Absolute magnitude (H) | 14.02 |
| Orbital period | 5.33 years |
| Semi-major axis | 3.05 au |
| Perihelion – aphelion | 2.68 – 3.42 au |
| Eccentricity | 0.121 |
| Inclination | 11.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.67 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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All asteroids named after someone called Adam