CFBDSIR 2149 – 0403 is classified as a brown dwarf. These have failed to initialize nuclear fusion in their cores, and develop into real, burning stars. While characterized as an AB Doradus star, due to its size and mass, many others characterize it as a gas giant. This would make it a planet without a parent star, which has been theorized but only rarely observed.
Only four possible candidates for the title of ‘rogue planet’ are known to exist, the one in question being the closest to earth at an estimated 130 light years. Without a large star to orbit, the motion of the plant is influenced by other stars in the AB Doradus star group. This doesn’t mean that it travels through space in any sort of straight line, a common misconception about rouge planets.