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On 2008 October 7, small asteroid 2008 TC3 turned itself into the parent bodyof the first meteor ever to be predicted before entering the Earth'satmosphere. Over five years later, the 2014 AA event became the second instanceof such an occurrence. The uncertainties associated with the pre-impact orbitof 2008 TC3 are relatively small because thousands of observations were madeduring the hours preceding the actual meteor airburst. In sharp contrast, 2014AA was only observed seven times before impact and consequently its trajectoryis somewhat uncertain. Here, we present a recalculation of the impactparameters -location and timing- of this meteor based on infrasound recordings.The new values and their uncertainties together with Monte Carlo and N-bodytechniques, are applied to obtain an independent determination of thepre-impact orbit of 2014 AA. Our orbital solution is used to investigate thepossible presence of known near-Earth objects (NEOs) moving in similar orbits.Prior to impact, 2014 AA was subjected to a web of overlapping secularresonances and it followed a path similar to those of 2011 GJ3, 2011 JV10, 2012DJ54, and 2013 NJ4. NEOs in this transient group have their orbits controlledby close encounters with the Earth-Moon system at perihelion and Mars ataphelion, perhaps constituting a dynamical family. Extensive comparison withother studies is also presented.

Homing in for New Year: impact parameters and pre-impact orbital evolution of meteoroid 2014 AA