We can have in KSP 2 something like sedna.
Orbit of Sedna Compared to Pluto's
The addition of a celestial body so far from its star would bring a new difficulty to the game, many new possibilities/challenges, and can be used for "testing" interstellar engines. Do you agree, do you disagree?
Links: https://en.wikipedia.org/wiki/90377_Sedna , https://de.wikipedia.org/wiki/Sednoid
Other Sednoids
https://en.wikipedia.org/wiki/2012_VP113 https://en.wikipedia.org/wiki/2015_TG387