RW Cephei

From the Science Archives, the open-project database of science information
Jump to navigation Jump to search

Template:PAGEBANNER:Cepheus constellation map.svg RW Cephei is a red hypergiant (or possibly a yellow hypergiant) located in the Cepheus constellation. It is believed to have a spectral class of K2.[1]

Spectral Classification controversy[edit]

The stellar classification has been classified as early as G8 and as late as M2, but it is not clear yet that there has been actual variation of the star. In the first Morgan-Keenan spectral atlas, RW Cephei's stellar classification was counted as M0:Ia.[2] RW Cep was later listed as the standard star for spectral type G8 Ia,[3] then as the standard for K0 0-Ia.[4]

Physical Properties[edit]

RW Cephei is one of the largest stars known. It is estimated to be 1,535 solar radii in radius, which is larger than the orbit of Jupiter.[5]


  5. Applying the Stefan-Boltzmann Law with a nominal solar effective temperature of 5,772 K: , or

Add your comment
The Science Archives welcomes all comments. If you do not want to be anonymous, register or log in. It is free.

As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Joey (talk), ynoss (talk), or Nussun (talk).