(31661) Eggebraaten Main-belt Asteroid
Discovered on 17 April 1999 by LINEAR at Socorro.
Andrew John Eggebraaten (b. 2001) is a finalist in the 2015 Broadcom MASTERS, a math and science competition for middle school students, for his electrical and mechanical engineering project. He attends the John Adams Middle School, Rochester, Minnesota.Naming citation (MPC batch dated 2015-11-25), IAU / Minor Planet Center, via NASA/JPL
Where Eggebraaten is today
Seen from above the solar system on 2026-10-14: Eggebraaten is 2.59 au from the Sun and 2.75 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31661 |
| Provisional designation | 1999 HJ11 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.97 km (#15,289 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.381 |
| Absolute magnitude (H) | 14.64 |
| Orbital period | 3.78 years |
| Semi-major axis | 2.43 au |
| Perihelion – aphelion | 2.17 – 2.69 au |
| Eccentricity | 0.107 |
| Inclination | 4.74° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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