See there are usually no course such as BTech Space Technology but if you wish to go for the space technology sector, then BTech Aerospace engineering will be the right choice for you.

As searched online, there is only one institute which offers the course of BTech Aerospace engineering in kerala and the name of the institution is-

IIST Thiruvananthapuram - Indian Institute of Space Science and Technology

So if you wish you can try this institute and the best part of this institute is that if you have score above 8.5 in your BTech semester, then you will be provided direct placement as scientist/engineer in ISRO.

For more information regarding Aerospace Engineering consider the link below:

https://www.careers360.com/courses/aerospace-engineering-course

I hope this helps. Wish you a great day!