Canis Major & Minor

Sirius is the brightest star in the skies shining at magnitude -1.44. Viewing its diminutive White Dwarf companion which is 10 magnitudes fainter (at mag +8.5) and separated by only 11 arc-sec is very challenging but is an unforgettable sight. Since Sirius is located in the constellation of Canis Major (“The Big Dog”) – its diminutive companion is often referred to as “The Pup”. White dwarf stars have masses that are about half that of our Sun but are squeezed down to the size of the earth! This density is roughly equivalent to squeezing a 3 Ton pickup truck down to the size of a sugar cube.
Often called “The Winter Alberio” (see Cygnus double stars) due to its striking color contrast.