New Extreme Trans-Neptunian Objects: Towards a Super-Earth in the Outer Solar System

Understand

We are conducting a survey for extreme solar system objects to understand Sedna and 2012 VP113 and determine if an unknown massive planet exists in the outer solar system.

• Two new objects, 2014 SR349 and 2013 FT28, are extreme detached trans-Neptunian objects, with a>150 AU and perihelia well beyond Neptune (q>40 AU).
• Both new objects have orbits with arguments of perihelia within the range of clustering of this angle for other extreme objects.
• One of these objects, 2014 SR349, has a longitude of perihelion similar to the other extreme objects, but 2013 FT28 is about 180 degrees away or anti-aligned in its longitude of perihelion.