This is a modified part of Sentar Expansion mod made by Borisbee, which itself is a modernized Planet Factory by Kragrathea. Both of them did a massive great job.

My longstanding opinion is that KSP should get a body like Ascension (and Ablate, for that matter), but years have passed and no development regarding the solar system was observed.
For those reasons I've decided to do make this modification so that stockalike comet reaches wider audience.

Licence is GPLv3.