Θ_Ceti
Theta Ceti
Orange-hued giant star in the constellation Cetus
Theta Ceti, Latinized from θ Ceti, is a solitary,[8] orange-hued star in the equatorial constellation of Cetus. It is visible to the naked eye with an apparent visual magnitude of 3.60.[2] Based upon an annual parallax shift of 28.66 mas as seen from Earth,[1] it is located about 114 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.10 due to interstellar dust.[2]
With an age of about 2.2 billion years,[6] this is an evolved, K-type giant star with a stellar classification of K0 III.[3] It is a red clump[9] star on the horizontal branch,[2] which means it is generating energy through helium fusion at its core.[9] The star has an estimated 1.8[6] times the mass of the Sun and has expanded to 10 times the Sun's radius.[2] It is radiating 53[2] times the solar luminosity from its photosphere at an effective temperature of 4,660 K.[6]