 The meteoroid's absolute magnitude (the apparent magnitude it would have at an altitude of 100 km at the observer's zenith) was approximately − 6 and did not vary significantly during the encounter. It travelled a distance of 409 km in 9.8 seconds during the time it was observed. It was moving with a speed of 41.74 km / s, which did not change during the flight. Jiří Borovička and Zdeněk Ceplecha from the Ondřejov Observatory in Czechoslovakia estimated that the deceleration caused by the friction of the atmosphere was only 1.7 m / s2 near the fireball's perigee (closest approach to Earth), which meant that its velocity was reduced by only 0.012 km / s. This corresponds well with computer simulations provided by D. W. Olson, R. L. Doescher and K. M. Watson at the Southwest Texas State University, who concluded that the meteoroid was practically not decelerated along its trajectory, with the exception of a very short time near perigee, when the deceleration was 1 m / s2.
