Eta Ceti [SEP] constellation
Eta Ceti
Eta Ceti (η Cet, η Ceti) is a star in the equatorial constellation of Cetus. It has the traditional name Deneb Algenubi or Algenudi. The apparent visual magnitude of this star is +3.4, making it the fourth-brightest star in this otherwise relatively faint constellation. The distance to this star can be measured directly using the parallax technique, yielding a value of .
This is a giant star with a stellar classification of K1 III, having exhausted the hydrogen at its core and evolved away
η Ceti itself is (, .)
Planetary system.
In 2014, two exoplanets around the star were discovered using the radial velocity method. Planets discovered by radial velocity have poorly known masses because if the orbit of the planets were inclined away from the line of sight, a much larger mass would have to compensate for the angle.
Eta Ceti b has a minimum mass of and an orbital period of 403.5 days (about 1.1 years), while Eta Ceti c has a minimum mass of and an orbital