(13623) Seanwalker Main-belt Asteroid
Discovered on 3 October 1995 by D. di Cicco at Sudbury.
Sean Walker (b. 1971) is an accomplished American artist, astrophotographer, and Sky & Telescope editor. He was one of the three founding members of the MDW H-α Sky Survey, where his extraordinary image-processing skills are helping reveal the intricate tapestry of glowing H-α nebulosity spread throughout the Milky Way galaxy.Naming citation (WGSBN Bull. 5, #3, 13), IAU / Minor Planet Center, via NASA/JPL
Where Seanwalker is today
Seen from above the solar system on 2026-10-14: Seanwalker is 2.54 au from the Sun and 2.96 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13623 |
| Provisional designation | 1995 TD |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.57 km (#16,125 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.321 |
| Absolute magnitude (H) | 15.05 |
| Orbital period | 3.33 years |
| Semi-major axis | 2.23 au |
| Perihelion – aphelion | 1.88 – 2.58 au |
| Eccentricity | 0.156 |
| Inclination | 6.40° |
| Closest distance between its orbit and Earth's (MOID) | 0.874 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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