Comet Bernardinelli-Bernstein

Largest known comet in our solar system. Cannot be seen with the naked eye. As large as Rhode Island.

When the dust cloud surrounding comet Bernardinelli-Bernstein (left) is digitally removed, the bare nucleus (right) measures about 120 kilometers across.

Hubble Space Telescope Detection of the Nucleus of Comet C/2014 UN271 (Bernardinelli–Bernstein) - IOPscience

https://iopscience.iop.org/article/10.3847/2041-8213/ac626a/pdfiopscience.iop.org