James Webb Telescope has a pressrelease, on freefloating browndwarrow W1935 and W2220. W2220 is staid; its methane absorbs light as usual. W1935's methane is glowing. Technically was, 47 years ago; but there's no reason to assume it's not still doing that.
Possibly why Dan Caselden, called here "Citizen Scientist", could spot it at all - at that distance. I do hope Caselden rejects the term, as a good antinationalist.
They figure W1935 has aurora. It has no star as should induce this. So - planetary-mass orbiter? It's hard to know even what to call such a satellite; they're going with "moon".
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