2020 FA31

2020 FA₃₁ is a distant trans-Neptunian object that was discovered 97.2 AU (14.54 billion km) from the Sun by Scott Sheppard, David Tholen, and Chad Trujillo on 24 March 2020.^[1] Announced on 14 February 2021, it is one of the most distant observable known objects in the Solar System.^[4]

2020 FA₃₁

Orbit of 2020 FA31
Discovery[1][2]
Discovered by	Scott S. Sheppard David J. Tholen Chad Trujillo
Discovery site	Mauna Kea Obs.
Discovery date	24 March 2020 (first imaged)
Designations
MPC designation	2020 FA31
Minor planet category	SDO[3] TNO[4] distant[2]
Orbital characteristics[4]
Epoch 9 June 2020 (JD 2459009.5)
Uncertainty parameter 9
Observation arc	0.82 yr (301 days)
Aphelion	102.447±47.846 AU
Perihelion	39.457±9.608 AU
Semi-major axis	70.952±33.137 AU
Eccentricity	0.44389±0.39513
Orbital period (sidereal)	597.66±418.70 yr
Mean anomaly	132.132°±320.990°
Mean motion	0° 0m 5.937s / day
Inclination	19.554°±0.030°
Longitude of ascending node	135.974°±0.152°
Argument of perihelion	260.344°±137.100°
Physical characteristics
Apparent magnitude	25.0[1]
Absolute magnitude (H)	5.361±0.097[4] 5.40[2]

See also

• List of Solar System objects most distant from the Sun