Hey there

Only a few colleges in our country has aerospace engineering on of them is Amrita university. At 80 percentile in jee mains no good college is offering aerospace engineering at low fees, also 15k in AEEE is a low rank and since you have not mentioned your category or state i am assuming you to be from open category and thus there is no chance of getting aerospace in coimbatore campus as well. Wait for results of jee mains september exam.

Check the link

https://engineering.careers360.com/articles/aeee-cutoff

good luck