As of 2024, Farfarout was the most distant known natural Solar System object observed from Earth.
Farfarout is the nickname for the trans-Neptunian object 2018 AG37. It was first imaged on January 15, 2018, by Scott Sheppard, David Tholen, and Chad Trujillo using the Subaru Telescope in Hawaii. The object was so faint and slow-moving that its discovery was recognised only after the images were reviewed months later.
At discovery, Farfarout was roughly 132 astronomical units from the Sun—about 132 times Earth’s average distance from the Sun. Its nickname deliberately followed Farout, the previous record-holder. The name is informal; 2018 AG37 remains the object’s official provisional designation because its orbit has not yet been observed for long enough to receive a permanent number and name.
Farfarout’s record needs careful wording. Some comets have travelled farther from the Sun, and spacecraft are also more distant, but Farfarout was the farthest currently observable known natural Solar System object in the 2024 context.