The southeast corner of the square, Algenib, is also a giant star, about 570 light-years away.
2.
Although it also had the traditional name " Algenib ", this name was also used for Alpha Persei.
3.
On 17 18 March, C / 2011 L4 was near the 2.8-magnitude star Algenib ( Gamma Pegasi ).
4.
The eastern edge of the Great Square, a line connecting Algenib and Alpheratz, is close to the imaginary line that serves as the celestial boundary marker between east and west.
5.
Together with Alpha Andromedae ( Alpheratz ) and Gamma Pegasi ( Algenib ), Beta Cassiopeiae was one of three bright stars known as the " Three Guides " marking the equinoctial colure.
6.
The southeastern star is Algenib, about 330 light-years away, and in the northeastern corner of the Great Square is Alpheratz, which is actually the head of the constellation Andromeda.
7.
Magnitude 2.31 to 2.74 over a period of 43.3 days . Markab and Algenib are blue-white stars of spectral types B9III and B2IV located 133 and 391 light-years distant respectively.
8.
The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included " Algenib " for this star ( Alpha Persei was given the name " Mirfak " ).
9.
With the historical name Mirfak ( Arabic for " elbow " ) or Algenib, Alpha Persei is the brightest star of this constellation with an apparent magnitude of 1.79 . A supergiant of spectral type F5Ib located around 590 light-years away from Earth, Mirfak has 5, 000 times the luminosity and 42 times the diameter of our Sun.
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