HD 3167 is a K0-type dwarf star, also designated as EPIC 220383386 and 2MASS J00345752+0422531.
The star has a radius and a mass roughly 86% that of the Sun, and is approximately 8 billion years old.
At a distance of just 149 light-years, HD 3167 is one of the closest and brightest stars hosting multiple transiting planets.
In September 2016, Vanderburg et al announced they had spotted two small, short-period planets — HD 3167b with a period of 0.95 days and HD 3167c with a period of 29.8 days — in orbit around the star.
Assisted by several telescopes and instruments, Christiansen et al confirmed the existence of HD 3167b and HD 3167c planets and discovered additional one, increasing the number of known planets in the system to three.
The newfound planet, named HD 3167d, is a super-Earth with a mass 6.9 times that of our home planet.
It whips around its parent star in just 8.5 days (between the orbits of the previously known planets)
To read more, click here.