|Discovered by||Mt. Lemmon Survey
|Discovery date||31 March 2012|
|MPC designation||2012 FC71|
|NEO · Aten 
|Orbital characteristics |
|Epoch 16 February 2017 (JD 2457800.5)|
|Uncertainty parameter : 5  · 7 |
|Observation arc||21 days|
|0.98 yr (359 days)|
|1° 0m 13.68s / day|
|Earth MOID||0.0566 AU · 22.1 LD|
Discovery, orbit and physical properties
It was first observed on March 31, 2012, by Andrea Boattini observing for the Mt. Lemmon Survey. Its orbit is characterized by low eccentricity (0.088), low inclination (4.97º) and a semi-major axis of 0.9895 AU; It is an Aten asteroid but also an Earth crosser. As of May 11, 2013 its orbit is based on 35 observations spanning a data-arc of 21 days.
Kozai resonator and future orbital evolution
2012 FC71 is locked in a Kozai resonance and as such it has a very slow orbital evolution and it will remain relatively unperturbed for hundreds of thousands of years. It had a close encounter with the Earth on April 18, 2012 at 0.076 AU and it had next one on about May 17, 2013 at 0.0581 AU.
It may have been originated within the Venus-Earth-Mars region or in the main asteroid belt like other Near-Earth Objects, then transition to Amor-class asteroid before entering Earth's co-orbital region.
- ^ This is assuming an albedo of 0.20–0.04.
- "2012 FC71". Minor Planet Center. Retrieved 2 February 2017.
- "JPL Small-Body Database Browser: 2012 FC71" (2012-04-21 last obs.). Jet Propulsion Laboratory. Retrieved 2 February 2017.
- "Absolute Magnitude (H)". NASA/JPL. Retrieved 2 February 2017.
- de la Fuente Marcos, C.; de la Fuente Marcos, R. (July 2013). "A resonant family of dynamically cold small bodies in the near-Earth asteroid belt". Monthly Notices of the Royal Astronomical Society: Letters. 434 (1): L1–L5. Bibcode:2013MNRAS.434L...1D. arXiv: . doi:10.1093/mnrasl/slt062.
- Discovery MPEC
- MPC data on 2012 FC71
- Further reading
- Secular perturbations of asteroids with high inclination and eccentricity Kozai, Y. 1962, Astronomical Journal, Vol. 67, p. 591
- The Kozai resonance for near-Earth asteroids with semimajor axes smaller than 2AU[permanent dead link] Michel, P., & Thomas, F. 1996, Astronomy and Astrophysics, Vol. 307, p. 310
- A resonant family of dynamically cold small bodies in the near-Earth asteroid belt de la Fuente Marcos, C., de la Fuente Marcos, R. 2013, Monthly Notices of the Royal Astronomical Society: Letters, Vol. 434, Issue 1, pp. L1-L5
- List Of Aten Minor Planets, Minor Planet Center
- MPEC 2012-G13 : 2012 FC71, discovery Minor Planet Electronic Circular (MPEC)
- AstDys-2 on 2012 FC71 at AstDys
- NEODyS-2 on 2012 FC71 at NEODyS
- 2012 FC71 at the JPL Small-Body Database