This newly discovered 'planet' isn't even orbiting a star.
Astronomers using NSF’s Karl G. Jansky Very Large Array have detected a ‘rogue’ planetary-mass object with a surprisingly powerful magnetic field
The object, called SIMP J01365663+0933473 (SIMP0136 for short), has roughly 12.7 times the mass of Jupiter and its radius is about 1.22 times that of Jupiter.
“This object is right at the boundary between a planet and a brown dwarf and is giving us some surprises that can potentially help us understand magnetic processes on both stars and planets,” said Dr. Melodie Kao, a postdoctoral researcher at Arizona State University.
SIMP0136 was originally discovered in 2006 by another team of researchers, led by University of Montréal astronomer Dr. Étienne Artigau. The discovery was made as part of a near-infrared proper-motion survey, SIMP (Sondage Infrarouge de Mouvement Propre).
In 2016, Dr. Kao and co-authors observed SIMP0136 with the Very Large Array (VLA) in order to gain new knowledge about magnetic fields and the mechanisms by which some of the coolest brown dwarfs can produce strong radio emission.
Brown dwarf masses are notoriously difficult to measure, and at the time, SIMP0136 was thought to be an old and much more massive brown dwarf.
Last year, Dr. Artigau’s team discovered that the object was part of a very young group of stars. Its young age meant that it was in fact so much less massive that it could be a free-floating planet.
At 200 million years old and approximately 20 light-years from Earth, SIMP0136 has a surface temperature of about 1,500 degrees Fahrenheit (825 degrees Celsius).
The difference between a gas giant planet and a brown dwarf remains hotly debated among astronomers, but one rule of thumb that they use is the mass below which deuterium fusion ceases, known as the ‘deuterium-burning limit,’ around 13 Jupiter masses. ...”
http://www.sci-news.com/astronomy/free-floating-exoplanet-extremely-strong-magnetic-field-06274.html
For the record, "brown dwarf" does't do it for me either. (Sounds like something from '60s era midget wrestling.)