K - type star

K - type stars are the second most common main sequence stars after M - type stars. Two well known examples are Epsilon Eridani and Alpha Centauri B. They have a mass of 0.6 to 0.9 of that of our sun, Sol. They have a smaller Habitable Zone. Their stellar lifetime is more than twice that of our sun's.

The star
Also known as orange dwarfs, these stars are orange in color. They are similar to Sol in many respects: similar radiation output and similar behavior. Luminosity of such stars is roughly between 10% and 50% of that generated by Sol. Their light output spectrum is ample across the visible spectra, even if the blue component is not quite as strongly emitted as by Sol. Unlike M - type stars, they tend not to give off such powerful flares and are expected to have sunspots similar in size to those of Sol.

Solar wind is present, but it's not so powerful, ultraviolet output is less and orange dwarf stars live longer and so over the course of billions of years change very little in brightness with stabler habitable zones. As a result, one might consider these stars as better candidates for colonization than G - type stars like Sol, our sun.

Their Habitable Zones, when compared to our Solar System's, would normally be centred closer in, usually somewhere between Mercury's and Venus's orbit.