Speed doesn't appear to be relevant when scooping from a star, other than it helping to make it easier to get away from possible interdiction threats. Therefore, when away from the bubble and scooping, you can slowly fly straight towards the centre of the star and when your fuel scoop hits its maximum rate, or your temperature gets as high as you feel safe letting it go, you can reduce throttle to zero and sit there as long as it takes to fill the tank. You don't even need to keep pointed at the star once you've set the throttle to zero.
No need to be constantly circling around the star, skimming the corona...
No need to be constantly circling around the star, skimming the corona...