The potentially dangerous asteroid (99942) Apophis

We computed impact solutions of the potentially dangerous asteroid (99942) Apophis based on 4022 optical observations and seven radar observations from 2013 March 15.10789 utc through March 28.089569 utc. Using the freely available orbfit software package, we can follow its orbit forward in the future searching for close approaches with the Earth, which can lead to possible impacts up to 2110. With the example of Apophis we show that it is possible to compute additional solutions using the weighting method of Bielicki. The possible impact path of risk for 2068 is presented.