It entered orbit, as planned, on a highly elliptical path that takes it from between 230 and 310 km above the surface to around 98 000 km every 4.2 days. (astrobio.net)
TESS is headed for an orbit around Earth that no spacecraft has ever occupied — a highly elliptical path in which the satellite will circle the planet twice for every orbit the moon completes. (scientificamerican.com)
In Kepler's final planetary model, he described planetary orbits as following elliptical paths with the Sun at a focal point of the ellipse. (en.wikipedia.org)