(12209) Jennalynn Main-belt Asteroid
Discovered on 11 March 1981 by S. J. Bus at Siding Spring.
Jenna Lynn Jones (née Crowell, b. 1984) received her PhD in physics from the University of Central Florida in 2018. Her dissertation involved shape modeling and analysis of thermal observations of near-Earth asteroid (1627) Ivar. Jenna has been active in outreach activities involving the public and school children in the fields of astronomy and physics.Naming citation (WGSBN Bull. 3, #1, 7), IAU / Minor Planet Center, via NASA/JPL
Where Jennalynn is today
Seen from above the solar system on 2026-10-14: Jennalynn is 2.30 au from the Sun and 2.97 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12209 |
| Provisional designation | 1981 EF37 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.66 km (#8,046 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.331 |
| Absolute magnitude (H) | 13.09 |
| Orbital period | 4.06 years |
| Semi-major axis | 2.55 au |
| Perihelion – aphelion | 2.23 – 2.87 au |
| Eccentricity | 0.125 |
| Inclination | 15.1° |
| Closest distance between its orbit and Earth's (MOID) | 1.26 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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