Tau Ceti has a right ascension of 01 hours 44 minutes and 04 seconds and a declination of -15 56 15. Tau Ceti is a star of G8.5 V spectral class at a distance of 11.9 light-years from Earth. It has a planetary system of at least 5 planets, two of which, Tau Ceti e and Tau Ceti f, could be in the star's habitable zone. Tau Ceti e has a mass of 4.3 Earth masses.