In article , Keith F. Lynch
wrote:

Also because 4.8 million out of 150 million is really not much
difference. It makes a difference of about 3% in light intensity,
hence of about 0.075% in equilibrium absolute temperature, i.e.
about 2 degrees C, or 3 degrees F.

4.8/150 = 3.2% in distance, which causes 6.5% change in intensity by
inverse square, and taking the fourth root of 1+that gives 1.6%
temperature change, or 4 degrees C.

--
David M. Palmer (formerly @clark.net, @ematic.com)