2013 ND15

Venus trojan asteroid February 2018 yes #FFC2E0 2013 ND 15 Pan-STARRS 13 July 2013 2013 ND 15 Aten asteroid Mercury crosser Venus crosser Earth crosser 13 January 2016 (JD 2457400.5) 1.1660 AU Gm on on 0.28100 AU Gm on 0.72351 AU Gm on 0.61162 0.62 yr (224.8 d) 4.7962° 95.841° 19.697° 198.82° 40–100 mA a none 24.1 1.6015°/day 7 0.00751978 AU km on 3.95146 AU Gm on 2013 ND 15 is a small asteroid that is a temporary trojan of Venus. Located at Venus's no, it is the first known Venus trojan. Discovery, orbit and physical properties 2013 ND 15 was discovered on 13 July 2013 by N. Primak, A. Schultz, T. Goggia and K. Chambers, observing for the Pan-STARRS project. As of September 2014, it has been observed 21 times with a data-arc span of 26 days. It is an Aten asteroid and its semi-major axis (0.7235 astronomical units; AU) is very similar to that of Venus but it has a high eccentricity (0.6115) and a small orbital inclination (4.794°). With an absolute magnitude of 24.1, it has a diameter in the range 40–100 m (for an assumed albedo range of 0.04–0.20). Trojan dynamical state and orbital evolution thumb|left|Animation of 2013 ND 15 relative to Sun and Venus Yellow Sun Lime VenusMagenta 2013 ND 15 2013 ND 15 has been identified as a Venus trojan following a tadpole orbit around Venus's Lagrangian point no. Besides being a Venus co-orbital, this asteroid is also a Mercury crosser and an Earth crosser. 2013 ND 15 exhibits resonant (or near-resonant) behavior with Mercury, Venus and Earth. Its short-term dynamical evolution is different from that of the other three Venus co-orbitals, 2001 CK 32, Zoozve, and 2012 XE 133. Potentially hazardous asteroid 2013 ND 15 is not included in the Minor Planet Center list of potentially hazardous asteroids (PHAs) because its absolute magnitude is greater than 22.0, even though it comes to within 0.05 AU of Earth periodically. It approached Earth at 0.077 AU on 21 June 2016. See also (322756) 2001 CK 32 524522 Zoozve 2012 XE 133 Notes A a none This is assuming an albedo of 0.20–0.04. References List Of Aten Minor Planets 2013 ND15 3645042 3 April 2016 AstDys-2 on 2013 ND15 Retrieved 2014-01-21 NEODyS-2 on 2013 ND15 Retrieved 2014-01-21 Absolute-magnitude conversion table (H) Asteroid 2013 ND15: Trojan companion to Venus, PHA to the Earth C. de la Fuente Marcos de la Fuente Marcos R. Monthly Notices of the Royal Astronomical Society 2014 439 3 2970–2977 10.1093/mnras/stu152 free 1401.5013 2014MNRAS.439.2970D 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. The population of Near Earth Asteroids in coorbital motion with Venus Morais, M. H. M., Morbidelli, A. 2006, Icarus, Vol. 185, Issue 1, pp. 29–38. Asteroid 2013 ND15: Trojan companion to Venus, PHA to the Earth de la Fuente Marcos, C., de la Fuente Marcos, R. 2013, Monthly Notices of the Royal Astronomical Society, Vol. 439, Issue 3, pp. 2970–2977. External links Discovery MPEC 2013 ND 15 data at MPC List of Potentially Hazardous Asteroids (PHAs) 2013+ND15 2013ND15 # Category:Trojan minor planets Category:Venus co-orbital minor planets Category:Minor planet object articles (unnumbered) Category:Venus-crossing asteroids Category:Earth-crossing asteroids 20130713