http://arxiv.org/abs/1801.05072
On June 2, 2016 at 10h56m UTC, a $-18.9 \pm 0.5$ magnitude superbolide was observed over Arizona. We present analysis of this event based on 6 cameras and a multi-spectral sensor observations by the SkySentinel continuous fireball-monitoring camera network, supplemented by a dash cam footage and a fragmentation model. The bolide began its luminous flight at an altitude of $104.8 \pm 0.5$ km at coordinates $\phi = 34.59 \pm 0.04^\circ$ N planetographic latitude, $\lambda = 110.45 \pm 0.04^\circ$ W longitude, and it had a pre-atmospheric velocity of $17.6 \pm 0.5$ km/s. The calculated orbital parameters indicate that the meteoroid did not belong to any presently known asteroid family. From our calculations, the impacting object had an initial mass of $11.4 \pm 0.5$ metric tonnes with an estimated initial size of $1.89 \pm 0.07$ m.
C. Palotai, R. Sankar, D. Free, et. al.
Wed, 17 Jan 18
13/51
Comments: 9 pages, 9 figures, 5 tables, submitted to MNRAS