| Discovery | |
|---|---|
| Discovered by | Mount Lemmon Survey (G96) |
| Discovery date | 17 March 2012 |
| Designations | |
| Apollo NEO[1] | |
| Orbital characteristics[1] | |
| Epoch 17 March 2012 (JD 2456003.5) | |
| Uncertainty parameter9 | |
| Aphelion | 1.4500 AU (216.92 Gm) |
| Perihelion | 0.99291 AU (148.537 Gm) |
| 1.2214 AU (182.72 Gm) | |
| Eccentricity | 0.18710 |
| 1.35 yr (493.07 d) | |
| 21.742° | |
| 0° 43m 48.432s /day | |
| Inclination | 3.2329° |
| 356.91° | |
| 147.89° | |
| Earth MOID | 0.015601 AU (2.3339 Gm) |
| Jupiter MOID | 3.54794 AU (530.764 Gm) |
| Physical characteristics | |
| Dimensions | ~5 meters (16 ft) |
| 29.2[1] | |
2012 FN is an Apollo asteroid and a near-Earth object[1] that has a 1 in 4 billion chance of impacting Earth on 7 March 2113.[2] It is estimated to be 5 meters in diameter, which means that it poses no threat if it impacts Earth. An impact would have the kinetic energy of about 3 kt of TNT,[2] and would probably result in an air burst in the upper atmosphere. It is the least threatening asteroid listed on the Sentry Risk Table.[3] The very short observation arc of only 3 hours[2] results in a very poorly constrained orbit, and it could just as easily be 2 AU from Earth on 7 March 2113.[4]
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