However , this magnitude varies between + 2.68 mag and + 2.74 as the stars pass in front of each other .
The combined apparent visual magnitude of the two stars is 2.68 , making it readily observable with the naked eye .
This magnitude varies between + 2.68 mag and + 2.74 as the stars pass in front of each other .
The combined apparent visual magnitude of the two stars is 2.68 , making it readily observable with the naked eye .