FarFarOut

FarFarOut is the nickname of a trans-Neptunian object discovered well beyond 100 AU (15 billion km) from the Sun.[3] Imaged in January 2018 during a search for the hypothetical Planet Nine,[2] 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.[3]

FarFarOut
Discovery[1]
Discovered by
Discovery siteMauna Kea Obs. (Subaru)
Discovery dateImaged: January 2018
Found: February 2019[2]
Designations
"FarFarOut"[3]
TNO[3]
Orbital characteristics
Observation arc2 days[2]
Physical characteristics
Mean diameter
~400 km (250 mi)[4]

    Distance
    See also: List of Solar System objects most distant from the Sun

    The object was initially estimated to be roughly 140 AU (21 billion km) from the Sun. Due to a very short observation arc, the uncertainties in this estimate have not been published. As of February 2019, it is the furthest observed member of the Solar System.[5]

    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.[6] Comet Donati (C/1858 L1) is 145 AU (22 billion km) from the Sun.[7]

    See also

    References
    1. Voosen, Paul (February 21, 2019). "Astronomers Discover Solar System's Most Distant Object, Nicknamed 'FarFarOut'". Science. doi:10.1126/science.aax1154.
    2. Redd, Noah Taylor (March 7, 2019). "New 'FarFarOut' World Is the Most Distant Solar System Object Known". Scientific American. Retrieved March 7, 2019.
    3. Davis, Nicola (February 25, 2019). "'FarFarOut': Astronomer Finds Potential Furthest Object in Solar System". The Guardian.
    4. Torbet, Georgina (March 2, 2019). "Dwarf Planet FarFarOut Is the Most Distant Object Discovered in Our Solar System". Digital Trends. Retrieved March 2, 2019.
    5. Strickland, Ashley (February 28, 2019). "FarFarOut displaces FarOut as the most distant object in our solar system". CNN. Retrieved March 24, 2019.
    6. "Horizon Online Ephemeris System for -43K1". Jet Propulsion Laboratory. Retrieved November 16, 2015.
    7. "JPL Horizons On-Line Ephemeris for Comet C/1858 L1 (Donati)". JPL Horizons On-Line Ephemeris System. Retrieved February 23, 2019.
      Observer Location: @sun
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