Deneb Kaitos (Beta Ceti)
The brightest star in the constellation Cetus;
it stands out in an otherwise barren area south of the Square
of Pegasus and northeast of Fomalhaut.
Its Arabic name means the "whale's tail," while an alternative name "Diphda"
(or "Dipda"), also Arabic, refers to the "first frog," where Formalhaut
was the "second frog." A giant K star (almost
type G), Deneb Kaitos is one of the brightest X-ray
stars in the solar neighborhood. Its high-energy radiation, 2,000 times
more powerful than that of the Sun, comes from a magnetically heated corona.
It is believed that the X-ray activity is related to the star's advanced
stage of evolution called core helium burning.
| X-ray image of Beta Ceti.
||R.A. 00h 43m 35.35s,
Dec. -17° 59' 11.9"