|Discovery date||Imaged: January 2018 |
Found: February 2019
|Observation arc||2 days|
|~400 km (250 mi)|
FarFarOut is the nickname of a trans-Neptunian object discovered while beyond 100 AU (15 billion km) from the Sun. Imaged in January 2018 during a search for the hypothetical Planet Nine, the object was announced in a press release on February 21, 2019, by astronomers Scott Sheppard, David Tholen, and Chad Trujillo, when they nicknamed it "FarFarOut" to emphasize its distance from the Sun.
The object was initially estimated to be roughly 140 AU (21 billion km) from the Sun. But with a very short observation arc the uncertainties in this estimated distance have not been published. As of February 2019[update], it is the furthest observed member of the Solar System.
Many near-parabolic comets are much further from the Sun. Caesar's Comet (C/-43 K1) is calculated to be more than 800 AU (120 billion km) from the Sun. Comet Donati (C/1858 L1) is 145 AU (22 billion km) from the Sun.