C/2019 O3 (Palomar) is a distant Oort cloud comet that came to perihelion on 8 March 2021 at a distance of 8.82 AU (1.319 billion km) from the Sun. It is discovered from the Palomar Observatory in July 2019, and is one of eight comets named after it.
References
External links C/2019 O3 at the JPL Small-Body Database C/2019 O3 at Seiichi Yoshida's website