Comet 2I/Borisov, discovered on August 29, 2019, has astronomers intrigued as it is only the second known object to be have an orbit and velocity that suggests it is of interstellar origin. It’s orbit has an eccentricity of about 3.5. It will reach perihelion on December 7, 2019.

Further Reading:

https://www.jpl.nasa.gov/news/news.php?release=2019-185

https://en.wikipedia.org/wiki/C/2019_Q4_(Borisov)