[doppler (Rick)]

Good to see you are off to a good start. The coloured spots are just hot pixels, darks should remove them. Your stacker program aligns the stars movement between each frame but the hot pixels are static on the sensor they don't follow the same alignment as the stars. Hot pixels are pretty normal (unless you have hundreds). Your polar alignment might be out a tadd so your stars are drifting a bit between frames, but if your polar alignment is good then the tracking speed might be a fraction slow or fast, I had similar problems with hot pixel streaking before I started auto guiding.


Rick