2012 FN

2012 FN

Discovery
Discovered by	Mount Lemmon Survey (G96)
Discovery date	17 March 2012
Designations
Minor planet category	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)
Semi-major axis	1.2214 AU (182.72 Gm)
Eccentricity	0.18710
Orbital period (sidereal)	1.35 yr (493.07 d)
Mean anomaly	21.742°
Mean motion	0° 43^m 48.432^s /day
Inclination	3.2329°
Longitude of ascending node	356.91°
Argument of perihelion	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)
Absolute magnitude (H)	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

• List of Apollo asteroids
• 2012 FP35

References

1. "JPL Small-Body Database Browser: (2012 FN)" (last observation: 2012-03-17; arc: 3 hours; uncertainty: 9). Jet Propulsion Laboratory. Retrieved 1 April 2016.
2. NASA JPL. "2012 FN Impact Risk". Archived from the original on 31 July 2014. Retrieved 25 October 2014.
3. Sentry Risk Table (NASA JPL)
4. "2012FN Ephemerides for 6-8 March 2113". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 25 October 2014.

External links

• List of Apollo asteroids, Minor Planet Center
• 2012 FN at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2012 FN at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2012 FN at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters