Hello

To get a space engineering in any IIT candidate has to secure GATE examination  in case of Btech holders . at least 55%  of marks is needed in qualifying examination.For Msc holders  CSIR-NET score is required too.Here you have not mentioned about which background you belongs to.Also each and every year the cutoff trend changes.In general onw should have rank under 150-200 to get direct admission in IITK.  But your marks is not matching with the criteria for taking admission in IIT with aerospace engineering . But being a OBC NCL candidate there is a  hope of chance of getting IIT for aerospace engineering .

https://engineering.careers360.com/gate-college-predictor

This will help.