| 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 parameter 9 | |
| 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]
See also
[edit]References
[edit]- ^ a b c d "JPL Small-Body Database Browser: (2012 FN)" (last observation: 2012-03-17; arc: 3 hours; uncertainty: 9). Jet Propulsion Laboratory. Retrieved 1 April 2016.
- ^ a b c NASA JPL. "2012 FN Impact Risk". Archived from the original on 31 July 2014. Retrieved 25 October 2014.
- ^ Sentry Risk Table (NASA JPL)
- ^ "2012FN Ephemerides for 6-8 March 2113". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 25 October 2014.
External links
[edit]- List of Apollo asteroids, Minor Planet Center
- 2012 FN at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2012 FN at ESA–space situational awareness
- 2012 FN at the JPL Small-Body Database
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction