I visited R Doradus where is red giant (type M) with very low temperature 1,866 K. First look can be promising but there are huge differences. I compared it to pictures of common red dwarfs and giant has texture applied right way - size of giant is visible on it. Another difference is star corona - corona height and structure is same as in case of red dwarfs - corona height is not relative to the star size. I recommend we disqualify giants and super giants from search.
Are we sure about corona scaling? Here's a
youtube video about visiting VY Canis Majoris, the biggest Red Supergiant. It looks like you can still see corona features 10k ls out.
I posted to the Raxxla thread assuming the star was a Red Giant or Red super giant.
I flew towards a Red Dwarf, Red Giant and Red Super Giant to try to replicate the picture.
The Red Super Giant stars I checked had textures visible >1000ly but were still a little small on the screen (I know the giants vary in size).
The Red Giant and Red Dwarf stars I flew toward only had visible textures at about 20 ls and they weren't anywhere close to the codex screenshot size until about 10-15 ls.
I personally don't think I've seen a gas giant so close to an M, but apparently
it is possible.
Stellar Class M is the coldest (and reddest) of the main-sequence stars. It is broken down into M0 (yellowest) to M9 (reddest, around 2000k temperature). I flew to some M9s and the color seems pretty close to the screenshot. M8 seemed too orange still.
I'm not sure how Tauri stars work.
You can see what classes of stars will be in a system without visiting it; on the galaxy map just look at the info tab with a system selected.
I did a search of EDSM for Red Giants or Red Super Giants with gas giants having at least 8 moons. There
were 41 results in the galaxy.
Only one was a Super giant, and none were class M9. I checked the 10 closest, mapped & flew around the 8th moons and didn't find anything.
There is only one M9 super giant within ~5000 ly of sol;
HD 25725. I flew out to check but it doesn't have any gas giants.