You mean if you park* your ship right next to the ring, ie 10km above it flying along it, you still can't fire a probe into it? I guess that's because it is "too far" from the centre of the planet and that's how it decides probe distance?
So that makes me wonder if the best option would be to fly inward until you are on the very edge of the sphere that has been deemed to be in range, and then see if you can find a way to fire at that ring. There might be something weird going on with the pathfinding so you have to aim somewhere other than the ring, firing outwards?
* 30 km/sec rather than 0 obviously
I am going to try to scan this ring.
Edit: It's 7k light years from my CMDR, who has to cobble together a ship with decent jump range.
@Lord Kril I was going to try to complete as much of the scan as possible, then find a moon in proximity to the outer ring and deliberately miss the moon to hit the ring, which used to be able to complete the scan on the body the ring is nominally attached to.
I am going to try to scan this ring.