(13943) Hankgreen Main-belt Asteroid
Discovered on 26 April 1990 by E. F. Helin at Palomar.
William Henry ‘Hank’ Green II (b. 1980) is an American science communicator, author, and creator. He has produced and hosted multiple educational online resources and podcasts, some with his brother, John Green. He frequently discusses topics related to science, including a regular update on the News from Mars segment of the Dear Hank & John podcast.Naming citation (WGSBN Bull. 4, #8, 9), IAU / Minor Planet Center, via NASA/JPL
Where Hankgreen is today
Seen from above the solar system on 2026-10-14: Hankgreen is 2.44 au from the Sun and 1.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13943 |
| Provisional designation | 1990 HG |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.20 km (#12,257 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.437 |
| Absolute magnitude (H) | 14.0 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 2.11 – 2.45 au |
| Eccentricity | 0.0758 |
| Inclination | 23.8° |
| Closest distance between its orbit and Earth's (MOID) | 1.10 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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