2006 RJ103 (also written 2006 RJ103) is a Neptune trojan discovered by the SDSS Collaboration in 2006. It was the fifth such body to be discovered. It has the same orbital period as Neptune and orbits at the L4 Lagrangian point about 60 degrees ahead of NeptuneWith an absolute magnitude of 7.5 it has a diameter in the range of 85 to 190 km.
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