**4. Some new impact solution for (99942) Apophis and (144898) 2004 VD17**

The new versions of the NEODyS-2: http://newton.dm.unipi.it/neodys/index.php?pc=0

and the new version of the OrbFit software: http://adams.dm.unipi.it/~orbmaint/orbfit/ were appeared.

Both they are based on the new error model (Chesley, Baer and Monet, 2010). The orbits are computed using star catalog debiasing and an error model with assumed astrometric errors RMS deduced from the tests of the paper cited above.

Also additional observations of (99942) Apophis and (144898) 2004 VD17 were added.
