Julia Augusta Taurinorum, an archaeoastronomical reload

Discussion of an astronomical orientation of Turin as Julia Augusta Taurinorum, based on the results previously given in 2012 and available at arXiv:1206.6062, and here refined according to the local natural horizon, the refraction of atmosphere, and the use of software Stellarium. Besides the evaluation of a possible astronomical orientation, the use of the azimuth of Via Garibaldi, which is corresponding to the Roman decumanus, shows that the town is following the geometrical rules of Roman varatio