Yep. But -19 (-19.3) is still too bright because the surface brightness of the Sun is unchanged. Only going past 30 AU will that 1 sq. arcminute start to become more dim than any 1 sq. arcminute we would see from space of the Sun at 1 AU.
I suggest you spend a little time here:Why do i see a shadow under helicopter? Is there a sun on mars ? Or is it the same one we have?