(20023) Jackmegas Main-belt Asteroid
Discovered on 9 January 1992 by E. F. Helin at Palomar.
Jack Megas (b. 1946) is a long-time planetarium educator at the Springfield Science Museum in Massachusetts, USA. He is a past president of the Springfield STARS Club and is a founder of the Connecticut River Valley Astronomers Conjunction. For decades, he has been sharing his knowledge and love of astronomy with the public.Naming citation (WGSBN Bull. 3, #13, 15), IAU / Minor Planet Center, via NASA/JPL
Where Jackmegas is today
Seen from above the solar system on 2026-10-14: Jackmegas is 2.35 au from the Sun and 3.27 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20023 |
| Provisional designation | 1992 AR |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.15 km (#7,457 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0790 |
| Absolute magnitude (H) | 14.18 |
| Orbital period | 4.27 years |
| Semi-major axis | 2.63 au |
| Perihelion – aphelion | 2.14 – 3.12 au |
| Eccentricity | 0.186 |
| Inclination | 10.7° |
| Closest distance between its orbit and Earth's (MOID) | 1.16 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Jack
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All asteroids named after someone called Jack