(31716) Matoonder Main-belt Asteroid
Discovered on 10 May 1999 by LINEAR at Socorro.
Madison Alise Toonder (b. 2001) is a finalist in the 2015 Broadcom MASTERS, a math and science competition for middle school students, for her environmental and earth sciences project. She is homeschooled at the Florida Virtual School, St. Augustine, Florida.Naming citation (MPC batch dated 2015-11-25), IAU / Minor Planet Center, via NASA/JPL
Where Matoonder is today
Seen from above the solar system on 2026-10-14: Matoonder is 2.82 au from the Sun and 2.41 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 31716 |
| Provisional designation | 1999 JJ57 |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.87 km (#9,125 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.107 |
| Rotation period | 4.57 hours |
| Absolute magnitude (H) | 14.55 |
| Orbital period | 5.27 years |
| Semi-major axis | 3.03 au |
| Perihelion – aphelion | 2.54 – 3.52 au |
| Eccentricity | 0.161 |
| Inclination | 3.46° |
| Closest distance between its orbit and Earth's (MOID) | 1.53 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Madison
All asteroids named after someone called Madison
Also discovered on 10 May 1999
- (11219) Benbohn
- (11225) Borden
- (11227) Ksenborisova
- (11228) Botnick
- (11229) Brookebowers
- (11230) Deschaffer
- (11231) Schiavo
- (11413) Catanach
- (11414) Allanchu
- (12117) Meagmessina
- (16048) Eddiedai
- (16049) D'Amore