(20341) Alanstack Main-belt Asteroid
Discovered on 21 April 1998 by LINEAR at Socorro.
Alan Stack mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Midwood High School, Brooklyn, New York.Naming citation (20040415/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Alanstack is today
Seen from above the solar system on 2026-10-14: Alanstack is 2.26 au from the Sun and 1.77 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20341 |
| Provisional designation | 1998 HX91 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.71 km (#13,444 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.245 |
| Absolute magnitude (H) | 14.56 |
| Orbital period | 3.76 years |
| Semi-major axis | 2.42 au |
| Perihelion – aphelion | 2.23 – 2.60 au |
| Eccentricity | 0.0765 |
| Inclination | 5.09° |
| Closest distance between its orbit and Earth's (MOID) | 1.24 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Alan
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- (9250) Chamberlin
- (9291) Alanburdick
- (10113) Alantitle
- (10204) Turing
- (10373) MacRobert
- (12431) Webster
All asteroids named after someone called Alan
Also discovered on 21 April 1998
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- (11715) Harperclark
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- (11718) Hayward
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- (11720) Horodyskyj
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- (12093) Chrimatthews