Ok basically they are NPC's made by bigpoint with the aspect of real npc's from maps,like lordakias/saimons etc that are immune to damage.The bot itself is made to circle the alien untill it kills it so your ship won't take damage from that alien.Because the bot doesn't have a time set to shoot on a alien,it will circle it until the alien would get killed,in this case it will never get killed,unles bigpoint removes it.So you can stop circling it by stopping the bot.
Also there is a big risk to be banned because administrators will 100% be sure that you are a bot user because you are doing same thing for hours with another 50+ players.
So take care which maps you bot in.
I hope i helped you