- W Ursae Majoris is an example.
- The companion component, "'44 Bo鰐is B "', is a W Ursae Majoris variable spectroscopic binary.
- Epsilon Coronae Australis is an W Ursae Majoris variable, indicating that it has a contact companion within the Roche Limit of the primary.
- The two stars in W Ursae Majoris are so close together that their outer envelopes are in direct contact, making them a contact binary system.
- W Ursae Majoris is the prototype of a class of contact binary variable stars, and ranges between 7.75 m and 8.48 m.
- "' WZ Cephei "'is an eclipsing binary star of W Ursae Majoris-type in the constellation of stellar companion in a wide orbit.
- This distinguishes them from the so-called beta Lyrae variables and W Ursae Majoris variables, where the two components are so close that gravitational effects lead to serious deformations of both stars.
- "' W Ursae Majoris "'( "'W UMa "') is the variable star designation for a binary star system in the northern constellation of Ursa Major.
- It is a W Ursae Majoris variable that ranges in magnitude from a minimum of 7.1 to a maximum of 6.5 every 0.27 days . Both stars are G-type stars.
- It was initially thought to be an Alfred H . Joy noted the similarity of its light curve to W Ursae Majoris in 1926, concluding the system was indeed an eclipsing binary with two stars of spectral type A8.