Maatarishwa

Namaskar, Please advise what would be the effect of having Ketu (Ketu alone) in 9th house for Karkataka (Cancer) Lagna? I have read that generally Ketu in 9th is bad for the native's father and native's dharma. However, if such a native has Ketu in pisces and be aspected by an exalted Jupiter and an exalted mercury, what would be the effects? This combination will be visible in September of this year. Thank you.