  We have shown previously (Bobylev et al 2011) that some of the stars in the
Solar neighborhood today may have originated in the same star cluster as the
Sun, and could thus be called Solar Siblings. In this work we investigate the
sensitivity of this result to Galactic models and to parameters of these
models, and also extend the sample of orbits. There are a number of good
candidates for the Sibling category, but due to the long period of orbit
evolution since the break-up of the birth cluster of the Sun, one can only
attach probabilities of membership. We find that up to 10% (but more likely
around 1 %) of the members of the Sun's birth cluster could be still found
within 100 pc from the Sun today.
