Board Thread:General Discussion/@comment-6192846-20130929130231/@comment-6192846-20150115131029

Jupiteir(e)/Jupitair(e) both seem fine to me. "teiru" is another spelling for a "tail" so it's in that range for pronunciation. If you want to make it more closely resemble Jupiter, then the E spelling might be better. I have no issue with either one.