VV Cephei

binary star in the constellation Cepheus

VV Cephei is a eclipsing binary star in the Cepheus constellation. It is 5,000 light years from Earth.

A now outdated comparison of star sizes, with VV Cephei A as the second largest in the 6th slide.
(Outdated) The Sun compared to VV Cephei A.

VV Cephei A is one of the largest known stars, being a red supergiant. Its diameter is around 779 times that of the Sun.[1] It is orbited by VV Cephei B, a blue star with 13–25 times the Solar radius. If VV Cephei A were placed in the center of our Solar System, its radius would reach past the orbit of Mars.

Related pagesEdit


  1. Baines, Ellyn K.; Thomas Armstrong, J.; Clark, James H.; Gorney, Jim; Hutter, Donald J.; Jorgensen, Anders M.; Kyte, Casey; Mozurkewich, David; Nisley, Ishara; Sanborn, Jason; Schmitt, Henrique R. (2021-11-01). "Angular Diameters and Fundamental Parameters of Forty-four Stars from the Navy Precision Optical Interferometer". The Astronomical Journal. 162 (5): 198. doi:10.3847/1538-3881/ac2431. ISSN 0004-6256.