Easily overlooked by casual stargazers, once you've seen it, you'll always enjoy this naked eye double when you look to the south in early autumn. Both stars are type-G, similar to our own sun, and slightly yellowish. These stars are not gravitationally bound, they just happened to lie along our line of site. 51' Double Star , One of the neatest and most colorful double stars in the sky, with a 3.1 magnitude yellow giant and a bluish 5.1 mag. companion. A beautiful site in a small to moderate telescope.
Large aperture can overwhelm some of it's subtle color.
To bring out the colors slightly de-focus. Alberio is about 390 light years away. This pair of intrinsically brilliant suns is 450 light years away. The two stars are separated by over 100 times Pluto's distance from the sun. The best of the Northern Hemisphere globular clusters, high overhead at the end of evening twilight for Arunah Hill Days.