5727 scan (i got the closest i could to 5719)

0-356 planets = good
70%
357-377 planets = fair
40%
378-428 planets = poor
15%
429-...? planets = very poor


so there it is folks....

good = 70-100%
fair = 40-70%
poor = 15-40%
very poor = under 15%
not sure where the button turns gray (probably 5%?)

Nice work Lone Lycan very helpful

another data point
4745 scan on the dot
450 planets on the dot maxed (wow that was actually pretty easy maxing out all planet)
scan to maximum planets supported ratio approx.
10.5:1

just to clarify, you're saying at 4745 scan, your button turned gray at 450 planets, right?

yes

Also I believe it starts saying "your scans are not efficient" at 50%, that's what I remember from the old % based days. And yes it's a real video it's my video. I don't think the algorithm has changed just how it's displayed, and grey area is 3-5% based on my experience with it (higher the scan the bit lower you can get on it).