As an earthling, you have evolved over the course of billions of years to deal with sunlight at a distance of one astronomical unit. That’s the distance of the earth’s orbit. That’s probably the most comfortable distance.
The Apollo moon missions used a so-called “barbecue” mode that rotated the capsules at three revolutions per hour. They did this during the 3-4 day coast phases to and from the moon. As far as I know this was able to mostly hold the interior temperatures in the “survivable” range.
Agreed. With no suit or any other thermal management tech, it’s going to be hard to survive anywhere just on thermal grounds alone.
However, let’s say you want to mitigate problems with sunburn and climb to a higher solar orbit. I haven’t calculated anything. But my intuition says you’re no longer getting enough heat input, and you will end up freeze dried. (The dried part is a vacuum effect we were told to ignore.)