(21473) Petesullivan Main-belt Asteroid
Discovered on 21 April 1998 by LINEAR at Socorro.
Peter Sullivan mentored a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Roseville Area High School, Roseville, Minnesota.Naming citation (20050224/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Petesullivan is today
Seen from above the solar system on 2026-10-14: Petesullivan is 2.11 au from the Sun and 1.14 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21473 |
| Provisional designation | 1998 HH99 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.97 km (#15,279 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.347 |
| Absolute magnitude (H) | 14.74 |
| Orbital period | 3.39 years |
| Semi-major axis | 2.26 au |
| Perihelion – aphelion | 1.96 – 2.55 au |
| Eccentricity | 0.130 |
| Inclination | 3.22° |
| Closest distance between its orbit and Earth's (MOID) | 0.951 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Peter
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All asteroids named after someone called Peter
Also discovered on 21 April 1998
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