A command to go 50 arcseconds north moves the telescope 50 arcseconds north, and your stars move 50 arcseconds south.
So, if your target is to the north of the slit, then you need to move north to get it into the slit.
A command to go 50 arcseconds north moves the telescope 50 arcseconds north, and your stars move 50 arcseconds south.
So, if your target is to the north of the slit, then you need to move north to get it into the slit.
