2018 AG37

2018 AG₃₇ is a dwarf planet. Its nickname is FarFarOut.^[8]

2018 AG₃₇

2018 AG37, pictures (or images) from the Gemini North telescope in 2019
Discovery[1][2]
Discovered by	S. S. Sheppard D. J. Tholen C. Trujillo
Discovery site	Mauna Kea Obs.
Discovery date	15 January 2018 (first observed)
Designations
MPC designation	2018 AG37
Alternative designations	"FarFarOut" (nickname)[3]
Minor planet category	SDO[4] TNO[5] distant[2] centaur[6][7]
Orbital characteristics[5]
Epoch 2019-Feb-26 (JD 2458540.5)
Uncertainty parameter 9
Observation arc	2.03 yr (740 days) using 11 observations
Aphelion	132.7±7.4 AU[a]
Perihelion	27.63±0.17 AU
Semi-major axis	80.2±4.5 AU
Eccentricity	0.655±0.02
Orbital period	717.8±60 yr[a]
Mean anomaly	186.9°±219°
Mean motion	0° 0m 4.949s / day
Inclination	18.68°±0.12°
Longitude of ascending node	68.35°±0.53°
Time of periastron	≈2366?
Argument of perihelion	231.9°±60°
Neptune MOID	≈3 AU (450 million km)[2]
Physical characteristics
Mean diameter	≈400 km (est.)[3] 797 km (est.)[6]
Geometric albedo	0.057 (est.)[6]
Apparent magnitude	25.3[1]
Absolute magnitude (H)	4.22±0.10[5] 4.22[2]

This illustration imagines what the distant object nicknamed "FarFarOut" might look like in the outer reaches of the Solar System

Notes

1. Statistics of small numbers and random observational errors cause the orbital elements to be very poorly constrained and the uncertainties are so large and non-linear that these error bars are not really meaningful and just show that the uncertainties are large. For example the JPL SBDB uncertainty in the perihelion date is 408 years (1-sigma) or 1224 years (3-sigma).