2003 YN107

From Wikipedia, the free encyclopedia
Jump to: navigation, search
2003 YN107
Discovered by LINEAR
Discovery date December 20, 2003
Minor planet category Aten
Orbital characteristics[1]
Epoch April 18, 2013 (JD 2456400.5)
Aphelion 152.300 Gm (1.00249947 AU)
Perihelion 146.125 Gm (0.9749381 AU)
149.212 Gm (0.98871878 AU)
Eccentricity 0.0139379
359.09355 d (0.98 a)
29.82 km/s
Inclination 4.32108°
Physical characteristics
Dimensions 10–30 m
Mass ~1–28×106 kg
~3–8×10-6 m/s²
~5–16×10-6 km/s
Temperature ~279 K

2003 YN107, also written 2003 YN107, is a very small near-Earth object moving in a 1:1 mean motion resonance with the Earth. As such it is co-orbital to Earth.[2][3][4]

Discovery, orbit and physical properties[edit]

It was discovered by the Lincoln Near Earth Asteroid Research (LINEAR) system in orbit around the Sun on December 20, 2003. Its diameter is approximately 10 to 30 metres, which is near the most commonly used 10-metre demarcation line between meteoroids and asteroids. 2003 YN107 is on NASA's Earth Close Approach list, and is estimated to miss the Earth by 0.01 AU. It revolves around the Sun on an Earth-like, almost circular, orbit. Its orbital period of 363.846 days also is very close to the sidereal year.

Co-orbital to the Earth and orbital evolution[edit]

Its most remarkable properties are that it has kept a distance of less than 0.1 AU (15 Gm or 15 million kilometres) and that it appeared to slowly orbit Earth during one year between 1996 and 2006. However, 2003 YN107 is no second moon, as it is not bound to the Earth. It is the first discovered member of a postulated group of coorbital objects, or quasi-satellites, which show these path characteristics.[2][3] Other members of this group include 10563 Izhdubar, 54509 YORP, (66063) 1998 RO1, (85770) 1998 UP1, and (85990) 1999 JV6. Before 1996, the asteroid had been on a so-called horseshoe orbit around the Sun, along the Earth's orbit. After 2006, it had regained such an orbit. This makes it very similar to 2002 AA29, which will become a quasi-satellite of Earth in approximately 600 years.[2][3][4]

See also[edit]


  1. ^ a b JPL Small-Body Database Browser
  2. ^ a b c Connors, M.; Veillet, C.; Brasser, R.; Wiegert, P.; Chodas, P.; Mikkola, S.; Innanen, K. (August 2004). "Discovery of Earth's quasi-satellite". Meteoritics & Planetary Science 39 (8): 1251–1255. Bibcode:2004M&PS...39.1251C. doi:10.1111/j.1945-5100.2004.tb00944.x. 
  3. ^ a b c Brasser, R.; Innanen, K. A.; Connors, M.; Veillet, C.; Wiegert, P.; Mikkola, S.; Chodas, P. W. (September 2004). "Transient co-orbital asteroids". Icarus 171 (1): 102–109. Bibcode:2004Icar..171..102B. doi:10.1016/j.icarus.2004.04.019. 
  4. ^ a b 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. 

External links[edit]