Well, you didn’t mention your category so I’m gonna assume its General.

The closing rank for Aerospace at IIT Bombay last year was 1841 so a rank under 1800 is what you should aim for. All the best.

For aersospace Engineering Roughly a rank better than 3500. Check out the previous years JEE website to get details

HAL is the highest recruiter in this field. Apart form them, Boeing and airbus have started their operations in the country and hence would be on the look for engineers and obviously their first choice would be IITians. Reliance aerospace, Mahindra aerospace are some other namces in this sector.