Brown dwarf?

Start with Brigo, then get rid of the craters and things like that. Add an atmosphere, make the bands glow, and you're done. For the very large crater, you could either get rid of it or turn it into a massive storm (which, by the way, would make it look totally cool)

Maybe you can use Brigo or something similar to make a fake gas giant.

https://www.simplerockets.com/CelestialBodies/View/caIap5/Fliese-13Ab-2-0
i don't know how, but it is possible.

i’ve done it before, but i can’t remember how