Kepler-20c is an discovered planet that is similar in size to Neptune. Despite being the third farthest planet from the star Kepler-20, it has a lower orbit than Mercury, meaning it is a hot Neptune. Along with the other four planets in the system, Kepler-20c was announced on December 20, 2011.
https://arxiv.org/abs/1112.4514
Observations of Kepler-20c
Collaborative projects
