Extreme trans-Neptunian object

[1] The known ETNOs exhibit a highly statistically significant asymmetry between the distributions of object pairs with small ascending and descending nodal distances that might be indicative of a response to external perturbations.

Malena Rice and Gregory Laughlin applied a targeted shift-stacking search algorithm to analyze data from TESS sectors 18 and 19 looking for candidate outer Solar System objects.

[20] Their search recovered known ETNOs like Sedna and produced 17 new outer Solar System body candidates located at geocentric distances in the range 80–200 AU, that need follow-up observations with ground-based telescope resources for confirmation.

Early results from a survey with WHT aimed at recovering these distant TNO candidates have failed to confirm two of them.

The most extreme case is that of 2015 BP519, nicknamed Caju, which has both the highest inclination[35] and the farthest nodal distance; these properties make it a probable outlier within this population.

The orbits of Sedna , 2012 VP 113 , Leleākūhonua , and other very distant objects along with the predicted orbit of Planet Nine [ A ]
The chart above plots trans-Neptunian objects with a perihelion beyond Neptune (30 AU ). While regular TNOs are located in the bottom left of the plot, an ETNO has a semi-major axis greater than 150–250 AU. They can be grouped by their perihelia into three distinct populations: [ 1 ] scattered ETNOs or ESDOs (38–45 AU)
detached ETNOs or EDDOs (40–45 to 50–60 AU)
Sednoids or inner Oort cloud objects (beyond 50–60 AU)
The Sun, the planets, their moons, and several trans-Neptunian objects The Sun Mercury Venus The Moon Earth Mars Phobos and Deimos Ceres The main asteroid belt Jupiter Moons of Jupiter Rings of Jupiter Saturn Moons of Saturn Rings of Saturn Uranus Moons of Uranus Rings of Uranus Neptune Moons of Neptune Rings of Neptune Pluto Moons of Pluto Haumea Moons of Haumea Makemake S/2015 (136472) 1 The Kuiper Belt Eris Dysnomia The Scattered Disc The Hills Cloud The Oort Cloud