Struve 649 is a double star featuring a fairly bright primary white-blue colored variable star with a dimmer blue companion nearby. This quaint pair lie in the constellation Eridanus, the river, best viewed in winter.
The primary star in Struve 649 is a variable star lingering around the 5th magnitude. This blue-white star has a stellar classification of B8V. At a friendly distance of 21.3 arcseconds away, the secondary star is more blue in color and is much dimmer at a magnitude of +9. This pair is also known as STF 649, SAO 131806, HD 33224, HR 1671.
The Garden Astronomer 