2012 FC71
| Discovery | |
|---|---|
| Discovered by | A. Boattini (Mt. Lemmon Survey) |
| Discovery date | March 31, 2012 |
| Designations | |
| MPC designation | 2012 FC71 |
|
Aten NEO,[1][2] Earth crosser | |
| Orbital characteristics[2][3][4] | |
| Epoch April 18, 2013 (JD 2456400.5) | |
| Aphelion | 1.07629AU |
| Perihelion | 0.9028 AU |
| 0.98953 AU | |
| Eccentricity | 0.0877 |
| 0.98 y (359.536 d) | |
| 186.20° | |
| Inclination | 4.97° |
| 38.708° | |
| 347.76° | |
| Physical characteristics | |
| Dimensions | 20-40 m[a][5] |
| 25.2[2] | |
|
| |
2012 FC71, also written 2012 FC71, is a small asteroid trapped in a Kozai resonance with the Earth.[6]
Discovery, orbit and physical properties
It was discovered on March 31, 2012 by A. Boattini observing for the Mt. Lemmon Survey.[7][8] Its orbit is characterized by low eccentricity (0.088), low inclination (4.97º) and a semi-major axis of 0.9895 AU;[8] 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.[6] It had a close encounter with the Earth on April 18, 2012 at 0.076 AU and it will have another one on May 21, 2013 at 0.057 AU.
Origin
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.[6]
See also
- 3753 Cruithne(1986 TO)
- 2001 GO2
- 2002 AA29
- 2003 YN107
- 2006 JY26
- 2009 SH2
- 2010 SO16
- 2013 BS45
Notes
- ^ This is assuming an albedo of 0.20–0.04.
References
- ↑ List Of Aten Minor Planets
- ↑ 2.0 2.1 2.2 2012 FC71 at the JPL Small-Body Database
- Discovery · Orbit diagram · Orbital elements · Physical parameters Retrieved 2013-05-11
- ↑ AstDys-2 on 2012 FC71 Retrieved 2013-05-11
- ↑ NEODyS-2 on 2012 FC71 Retrieved 2013-05-11
- ↑ Absolute-magnitude conversion table (H)
- ↑ 6.0 6.1 6.2 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. arXiv:1305.2825. Bibcode:2013MNRAS.434L...1D. doi:10.1093/mnrasl/slt062.
- ↑ Discovery MPEC
- ↑ 8.0 8.1 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 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.
External links
- 2012 FC71 data at MPC
- MPEC 2012-G13 : 2012 FC71 (Discovery MPEC)
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