I have much the same process as the OP, but I've never had a heat issue.. Why? I'm patient enough to wait to 7-10 seconds required to get to a safe distance..
For the OP's benefit, I've visited around 8k systems, 3k of which were new discoveries. And it seems that you always leave a system after scanning, do you not map any planets? Or land on them? That's one of the reasons for getting out there.. You are missing out on a large portion of the exploration payout, too.
For the OP's benefit, I've visited around 8k systems, 3k of which were new discoveries. And it seems that you always leave a system after scanning, do you not map any planets? Or land on them? That's one of the reasons for getting out there.. You are missing out on a large portion of the exploration payout, too.