2014 are massive and have wide orbits so probably represent the low-mass end of a brown dwarf formation. One study suggests that objects above formed through gravitational instability and should not be thought of as planets.

Also, the 13-Jupiter-mass cutoff does not have a precise physical significance. Deuterium fusion can occur in some objects with a mass below that cutoff. The amount of deuterium fused depends to some extent on the composition of the object. In 2011, the Extrasolar Planets Encyclopaedia