Why is it that Lacaille 8760 and Kepler 442 have approximately the same mass, but the former is a red dwarf and the latter is an orange dwarf? – astronomy.stackexchange.com

The stars Lacaille 8760 and Kepler 442 both weigh 0.6 solar masses, but the former is 600 degrees cooler (3,800 K) than the latter (4,400 K), and much dimmer (bolumetric luminosity is 0.072 solar ...