2015 YQ1

Near-Earth horseshoe asteroid February 2018 #FFC2E0 2015 YQ 1 Mount Lemmon Srvy. Mount Lemmon Obs. 19 December 2015 2015 YQ 1 Apollo asteroidList Of Apollo Minor Planets Earth crosser 3738932 Retrieved 2016-03-09AstDys-2 on 2015 YQ1 Retrieved 2016-03-09NEODyS-2 on 2015 YQ1 Retrieved 2016-03-09 13 January 2016 (JD 2457400.5) 6 3 days 1.40586 AU 0.59681 AU 1.00134 AU 0.40398 0.00052 AU 1.00202 y (365.99 d) 2.4865° 88.89770° 112.185° 317.067° 7–16 mA a noneAbsolute-magnitude conversion table (H) 28.1 2015 YQ 1 is an Apollo asteroid that is a temporary horseshoe companion to the Earth, the twelfth known Earth horseshoe librator.A trio of horseshoes: past, present and future dynamical evolution of Earth co-orbital asteroids 2015 XX169, 2015 YA and 2015 YQ1 Carlos de la Fuente Marcos de la Fuente Marcos Raúl 1 April 2016 Astrophysics and Space Science 361 4 121 (13 pages) 1603.02415 2016Ap&SS.361..121D 10.1007/s10509-016-2711-6 189843906 It experienced a close encounter with the Earth on 22 December 2015 at 0.0037 AU. Discovery 2015 YQ 1 was discovered on 19 December 2015 by A. D. Grauer observing with the 1.5-m reflector telescope at the Mount Lemmon Survey.Discovery MPEC As of 9 March 2016, it has been observed 64 times with an observation arc of 3 days. Orbit and orbital evolution thumb|left|Animation of 2015 YQ1's orbit relative to Sun and Earth Magenta 2015 YQ1Yellow SunRoyalBlue Earth 2015 YQ 1 is currently an Apollo asteroid (Earth-crossing but with a period greater than a year). Its semi-major axis (currently 1.00134 astronomical units; AU) is similar to that of Earth (1.00074 AU), but it has a relatively high eccentricity (0.40398) and low orbital inclination (2.4865°). It alternates between being an Aten asteroid and being an Apollo asteroid. As of 9 March 2016, this object is the 17th known Earth co-orbital and the 12th known object following a horseshoe path with respect to our planet. Asteroid 2015 YQ 1 follows an asymmetrical horseshoe path with respect to our planet; the value of its relative mean longitude oscillates about 180°, but enclosing 0°; its orbital evolution is rather unstable. Physical properties With an absolute magnitude of 28.1 mag, it has a diameter in the range 7–16 meters (for an assumed albedo range of 0.04–0.20, respectively).March 2025 See also 18em 54509 YORP (419624) 2010 SO 16 3753 Cruithne 2015 SO 2 2015 XX 169 2015 YA Notes A a none This is assuming an albedo of 0.20–0.04. References Further reading Understanding the Distribution of Near-Earth Asteroids Bottke, W. F., Jedicke, R., Morbidelli, A., Petit, J.-M., Gladman, B. 2000, Science, Vol. 288, Issue 5474, pp. 2190–2194. A Numerical Survey of Transient Co-orbitals of the Terrestrial Planets Christou, A. A. 2000, Icarus, Vol. 144, Issue 1, pp. 1–20. Debiased Orbital and Absolute Magnitude Distribution of the Near-Earth Objects Bottke, W. F., Morbidelli, A., Jedicke, R., Petit, J.-M., Levison, H. F., Michel, P., Metcalfe, T. S. 2002, Icarus, Vol. 156, Issue 2, pp. 399–433. Transient co-orbital asteroids Brasser, R., Innanen, K. A., Connors, M., Veillet, C., Wiegert, P., Mikkola, S., Chodas, P. W. 2004, Icarus, Vol. 171, Issue 1, pp. 102–109. A trio of horseshoes: past, present and future dynamical evolution of Earth co-orbital asteroids 2015 XX169, 2015 YA and 2015 YQ1 de la Fuente Marcos, C., de la Fuente Marcos, R. 2016, Astrophysics and Space Science, Vol. 361, Issue 4, article 121 (13 pp). External links MPEC 2015-Y53 : 2015 YQ1, Discovery Minor Planet Electronic Circular, (at ADS) 2015 YQ 1 data at MPC 2015+YQ1 2015YQ1 3738932 # Category:Minor planet object articles (unnumbered) Category:Earth-crossing asteroids # 20151219