Hi I noticed today that the positions of Jupiters' moons as plotted by KStars do not agree with those plotted by Stellarium or by CalSky, whereas the latter two agree with each other quite well. I suspect something is wrong with our software, and that we must check it against HORIZONS, and look into what the problem might be. I tried building b9e0973b96e4404c42f39f49e77928f55f80ac07 (Feb 1 2015) and it still seems to have the problem. Regards Akarsh